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The Muslim conquest
Muslim conquest
of Persia, also known as the Arab
Arab
conquest of Iran,[2] led to the end of the Sasanian Empire
Sasanian Empire
in 651 and the eventual decline of the Zoroastrian religion in Iran
Iran
(Persia). The rise of Muslims
Muslims
coincided with an unprecedented political, social, economic and military weakness in Persia. Once a major world power, the Sasanian Empire
Sasanian Empire
had exhausted its human and material resources after decades of warfare against the Byzantine Empire. The internal political situation quickly deteriorated after the execution of King Khosrow II
Khosrow II
in 628 AD. Subsequently, ten new claimants were enthroned within the next four years.[3] With conflict erupting between Persian and Parthian factions, the empire was no longer centralized. Arab Muslims
Arab Muslims
first attacked the Sassanid
Sassanid
territory in 633, when general Khalid ibn Walid
Khalid ibn Walid
invaded Mesopotamia
Mesopotamia
( Sassanid
Sassanid
province of Asōristān; what is now Iraq), which was the political and economic center of the Sassanid
Sassanid
state.[4] Following the transfer of Khalid to the Byzantine front in the Levant, the Muslims
Muslims
eventually lost their holdings to Sassanian counterattacks. The second invasion began in 636 under Saad ibn Abi Waqqas, when a key victory at the Battle of al-Qādisiyyah led to the permanent end of Sasanian control west of Iran. The Zagros mountains
Zagros mountains
then became a natural barrier and border between the Rashidun Caliphate
Rashidun Caliphate
and the Sassanid
Sassanid
Empire. Due to continuous raids by Persians into the area, Caliph
Caliph
Umar
Umar
ordered a full invasion of the Sasanian empire in 642, which led to the complete conquest of the Sasanians around 651.a[›] Directing from Medina, a few thousand kilometres from the battlefields of Iran, Caliph
Caliph
Umar's quick conquest of Iran
Iran
in a series of well-coordinated, multi-pronged attacks became his greatest triumph, contributing to his reputation as a great military and political strategist.[3] Iranian historians have defended their forebears vis a vis Arab sources to illustrate that "contrary to the claims of some historians, Iranians, in fact, fought long and hard against the invading Arabs."[5] By 651, most of the urban centers in Iranian lands, with the notable exception of the Caspian provinces (Tabaristan) and Transoxiana, had come under the domination of the Arab
Arab
armies. Many localities fought against the invaders; ultimately, none were successful. In fact, although Arabs had established hegemony over most of the country, many cities rose in rebellion by killing the Arab governor or attacking their garrisons. Eventually, military reinforcements quashed the insurgency and imposed Islamic control. The violent subjugation of Bukhara
Bukhara
is a case in point: Conversion to Islam was gradual, partially as the result of this violent resistance; however, Zoroastrian scriptures were burnt and many priests were executed.[6] However, the Persians began to reassert themselves by maintaining Persian language
Persian language
and culture. Islam
Islam
would become the dominant religion late in the medieval ages.[7][8]

Contents

1 Historiography and recent scholarship 2 Sassanid Empire
Sassanid Empire
before the Conquest

2.1 Revolt of the Arab
Arab
client states (602) 2.2 Byzantine– Sassanid
Sassanid
War (612–629)

2.2.1 Execution of Khosrau II

2.3 During Muhammad's life

3 Rise of the Caliphate 4 First invasion of Mesopotamia
Mesopotamia
(633) 5 Second invasion of Mesopotamia
Mesopotamia
(634–636)

5.1 Battle of the Bridge 5.2 Battle of Qadisiyyah

6 Conquest of Mesopotamia
Mesopotamia
(636–638)

6.1 Raids of Persians in Mesopotamia
Mesopotamia
(638–641)

7 Battle of Nahavand
Battle of Nahavand
(642) 8 Conquest of Persia
Persia
(642–651)

8.1 Strategic planning for the conquest of Persia 8.2 Conquest of Central Iran 8.3 Conquest of Fars

8.3.1 First Muslim
Muslim
invasion and the successful Sasanian counter-attack 8.3.2 Second and last Muslim
Muslim
invasion

8.4 Conquest of Southeastern Persia
Persia
( Kerman
Kerman
and Makran) 8.5 Conquest of Sakastan 8.6 Conquest of Azerbaijan 8.7 Conquest of Armenia 8.8 Conquest of Khorasan

9 Persian rebellion and reconquest 10 End of the Sassanid
Sassanid
dynasty 11 Persia
Persia
under Muslim
Muslim
rule

11.1 Administration 11.2 Religion

12 Language of Persia 13 Urbanisation 14 See also 15 References 16 Sources 17 External links

Historiography and recent scholarship[edit] When Western academics first investigated the Muslim conquest
Muslim conquest
of Persia, they only had to rely on the accounts of the Armenian Christian
Christian
bishop Sebeos, and accounts in Arabic
Arabic
that were written some time after the events they describe. The most significant work was probably that of Arthur Christensen, and his L’ Iran
Iran
sous les Sassanides, published in Copenhagen
Copenhagen
and Paris
Paris
in 1944.[9] However recent scholarship, both Iranian and Western,[citation needed] has begun to question the traditional narrative. Parvaneh Pourshariati, in her Decline and Fall of the Sasanian Empire: The Sasanian-Parthian Confederacy and the Arab
Arab
Conquest of Iran, published in 2008, provides both a detailed overview of the problematic nature of trying to establish exactly what happened, and a great deal of original research that questions fundamental facts of the traditional narrative, including the timeline and specific dates. Pourshariati's central thesis is that contrary to what was commonly assumed, the Sassanian Empire was highly decentralized, and was in fact a "confederation" with the Parthians, who themselves retained a high level of independence.[10] Despite their recent victories over the Byzantine Empire, the Parthians
Parthians
unexpectedly withdrew from the confederation, and the Sassanians were thus ill-prepared and ill-equipped to mount an effective and cohesive defense against the Muslim
Muslim
armies.[11] Moreover, the powerful northern and eastern Parthian families, the kust-i khwarasan and kust-i adurbadagan, withdrew to their respective strongholds and made peace with the Arabs, refusing to fight alongside the Sassanians. Another important theme of Pourshariati's study is a re-evaluation of the traditional timeline. Pourshariati argues that the Arab
Arab
conquest of Mesopotamia
Mesopotamia
"took place, not, as has been conventionally believed, in the years 632–634, after the accession of the last Sasanian king Yazdgerd III
Yazdgerd III
(632–651) to power, but in the period from 628 to 632."[12] An important consequence of this change in timeline means that the Arab
Arab
conquest started precisely when the Sassanians and Parthians
Parthians
were engaged in internecine warfare over succession to the Sassanian throne.[12] Sassanid Empire
Sassanid Empire
before the Conquest[edit] Since the 1st century BC, the border between the Roman (later Byzantine) and Parthian (later Sassanid) empires had been the Euphrates
Euphrates
River. The border was constantly contested. Most battles, and thus most fortifications, were concentrated in the hilly regions of the north, as the vast Arabian or Syrian Desert
Syrian Desert
(Roman Arabia) separated the rival empires in the south. The only dangers expected from the south were occasional raids by nomadic Arab
Arab
tribesmen. Both empires therefore allied themselves with small, semi-independent Arab principalities, which served as buffer states and protected Byzantium and Persia
Persia
from Bedouin
Bedouin
attacks. The Byzantine clients were the Ghassanids; the Persian clients were the Lakhmids. The Ghassanids
Ghassanids
and Lakhmids
Lakhmids
feuded constantly, which kept them occupied, but that did not greatly affect the Byzantines or the Persians. In the 6th and 7th centuries, various factors destroyed the balance of power that had held for so many centuries. Revolt of the Arab
Arab
client states (602)[edit]

Ancient Iranians attached great importance to music and poetry, as they still do today. This 7th century plate depicts Sassanid
Sassanid
era musicians.

The Byzantine clients, the Arab
Arab
Ghassanids, converted to the Monophysite
Monophysite
form of Christianity, which was regarded as heretical by the established Byzantine Orthodox Church. The Byzantines attempted to suppress the heresy, alienating the Ghassanids
Ghassanids
and sparking rebellions on their desert frontiers. The Lakhmids
Lakhmids
also revolted against the Persian king Khusrau II. Nu'man III (son of Al-Monder IV), the first Christian
Christian
Lakhmid
Lakhmid
king, was deposed and killed by Khusrau II
Khusrau II
in 602, because of his attempt to throw off the Persian tutelage. After Khusrau's assassination, the Persian Empire fractured and the Lakhmids were effectively semi-independent. It is now widely believed that the annexation of the Lakhmid
Lakhmid
kingdom was one of the main factors behind the Fall of Sassanid
Sassanid
dynasty, to the Muslim
Muslim
Arabs and the Islamic conquest of Persia, as the Lakhmids
Lakhmids
agreed to act as spies for the Muslims
Muslims
after being defeated in the Battle of Hira
Battle of Hira
by Khalid ibn al-Walid.[13] Byzantine– Sassanid
Sassanid
War (612–629)[edit] Main articles: Byzantine- Sassanid
Sassanid
War of 602–628 and Byzantine– Sassanid
Sassanid
Wars See also: Fall of Sassanid
Sassanid
dynasty The Persian ruler Khosrau II
Khosrau II
(Parviz) defeated a dangerous rebellion within his own empire, the Bahram Chobin's rebellion. He afterward turned his energies towards his traditional Byzantine enemies, leading to the Byzantine- Sassanid
Sassanid
War of 602–628. For a few years, he succeeded gloriously. From 612 to 622, he extended the Persian borders almost to the same extent that they were under the Achaemenid dynasty (550–330 BC), capturing Western states as far as Egypt, Palestine (the conquest of the latter being assisted by a Jewish army), and more. The Byzantines regrouped and pushed back in 622 under Heraclius. Khosrau was defeated at the Battle of Nineveh in 627, and the Byzantines recaptured all of Syria
Syria
and penetrated far into the Persian provinces of Mesopotamia. In 629, Khosrau's general Shahrbaraz
Shahrbaraz
agreed to peace, and the border between the two empires was once again the same as it was in 602. Execution of Khosrau II[edit] See also: Sasanian civil war of 628-632

Sassanid
Sassanid
King Khosrau II
Khosrau II
submitting to the Byzantine Emperor Heraclius, from a plaque on a 12th-century French cross

Khosrau II
Khosrau II
was executed in 628 and as a result, there were numerous claimants to the throne; from 628 to 632 there were ten kings and queens of Persia. The last, Yazdegerd III, was a grandson of Khosrau II and was said to be a mere child aged 8 years.[14] During Muhammad's life[edit] After the Treaty of Hudaybiyyah
Treaty of Hudaybiyyah
in 628, Islamic tradition holds that Prophet Muhammad
Prophet Muhammad
sent many letters to the princes, kings, and chiefs of the various tribes and kingdoms of the time, preaching them to convert to Islam
Islam
and bow to the order of Allah. These letters were carried by ambassadors to Persia, Byzantium, Ethiopia, Egypt, Yemen, and Hira (Iraq) on the same day.[15] This assertion has been brought under scrutiny by some modern historians of Islam—notably Grimme and Caetani.[16] Particularly in dispute is the assertion that Khosrau II received a letter from Muhammad, as the Sassanid
Sassanid
court ceremony was notoriously intricate, and it is unlikely that a letter from what at the time was a minor regional power would have reached the hands of the Shahanshah.[17] With regards to Persia, Muslim
Muslim
histories further recount that at the beginning of the seventh year of migration, Muhammad appointed one of his officers, Abdullah Huzafah Sahmi Qarashi, to carry his letter to Khosrau II
Khosrau II
inviting him to convert:

In the name of Allah, the Beneficent, the Merciful. From Muhammad, the Messenger of Allah, to the great Kisra of Iran. Peace be upon him, who seeks truth and expresses belief in Allah
Allah
and in His Prophet and testifies that there is no god but Allah
Allah
and that He has no partner, and who believes that Muhammad is His servant and Prophet. Under the Command of Allah, I invite you to Him. He has sent me for the guidance of all people so that I may warn them all of His wrath and may present the unbelievers with an ultimatum. Embrace Islam so that you may remain safe. And if you refuse to accept Islam, you will be responsible for the sins of the Magi.[18]

There are differing accounts of the reaction of Khosrau II.[19] Nearly all assert that he destroyed the letter in anger; the variations concentrate on the extent and detail of his response.[citation needed]. Rise of the Caliphate[edit] Prophet Muhammad
Prophet Muhammad
died in June 632, and Abu Bakr
Abu Bakr
took the title of Caliph
Caliph
and political successor at Medina. Soon after Abu Bakr's succession, several Arab
Arab
tribes revolted, in the Ridda Wars
Ridda Wars
(Arabic for the Wars of Apostasy). The Ridda Wars
Ridda Wars
preoccupied the Caliphate until March 633, and ended with the entirety of the Arab
Arab
Peninsula under the authority of the Caliph
Caliph
at Medina. Whether Abu Bakr
Abu Bakr
actually intended a full-out imperial conquest or not is hard to say. He did, however, set in motion a historical trajectory (continued later on by Umar
Umar
and Uthman) that in just a few short decades would lead to one of the largest empires in history,[20] beginning with a confrontation with the Sassanid Empire
Sassanid Empire
under the general Khalid ibn al-Walid. First invasion of Mesopotamia
Mesopotamia
(633)[edit]

Map detailing the route of Khalid ibn Walid's conquest of Mesopotamia

After the Ridda Wars, a tribal chief of north eastern Arabia, Al-Muthanna ibn Haritha, raided the Persian towns in Mesopotamia
Mesopotamia
(what is now Iraq). Abu Bakr
Abu Bakr
was strong enough to attack the Persian Empire in the north-east and the Byzantine Empire
Byzantine Empire
in the north-west. There were three purposes for this conquest: 1. Along the borders between Arabia and these two great empires were numerous Arab
Arab
tribes leading a nomadic life and forming a buffer-like state between the Persians and Romans. Abu Bakr
Abu Bakr
hoped that these tribes might accept Islam
Islam
and help their brethren in spreading it. 2. The Persian and Roman populations suffered with very high taxation laws; Abu Bakr
Abu Bakr
believed that they might be persuaded to help the Muslims, who agreed to release them from the excessive tributes. 3. Two gigantic empires surrounded Arabia, and it was unsafe to remain passive with these two powers on its borders. Abu Bakr
Abu Bakr
hoped that by attacking Iraq
Iraq
and Syria
Syria
he might remove the danger from the borders of the Islamic State.[21] With the success of the raids, a considerable amount of booty was collected. Al-Muthanna ibn Haritha went to Medina
Medina
to inform Caliph
Caliph
Abu Bakr
Abu Bakr
about his success and was appointed commander of his people, after which he began to raid deeper into Mesopotamia. Using the mobility of his light cavalry he could easily raid any town near the desert and disappear again into the desert, into which the Sassanid
Sassanid
army was unable to chase them. Al-Muthanna's acts made Abu Bakr
Abu Bakr
think about the expansion of the Rashidun Empire.[22] To be certain of a victory, Abu Bakr
Abu Bakr
made two decisions concerning the attack on Persia: first, the invading army would consist entirely of volunteers; and second, to put in command of the army his best general: Khalid ibn al-Walid. After defeating the self-proclaimed prophet Musaylimah in the Battle of Yamama, Khalid was still at Al-Yamama
Al-Yamama
when Abu Bakr
Abu Bakr
sent him orders to invade the Sassanid
Sassanid
Empire. Making Al-Hirah
Al-Hirah
the objective of Khalid, Abu Bakr
Abu Bakr
sent reinforcements and ordered the tribal chiefs of north eastern Arabia, Al-Muthanna ibn Haritha, Mazhur bin Adi, Harmala and Sulma to operate under the command of Khalid along with their men. Around the third week of March 633 (first week of Muharram
Muharram
12th Hijrah) Khalid set out from Al-Yamama with an army of 10,000.[22] The tribal chiefs, with 2,000 warriors each, joined Khalid; so he entered the Persian Empire with 18,000 troops. After entering Mesopotamia
Mesopotamia
with his army of 18,000, Khalid won decisive victories in four consecutive battles: the Battle of Chains, fought in April 633; the Battle of River, fought in the third week of April 633 AD; the Battle of Walaja, fought in May 633 (where he successfully used a double envelopment manoeuvre), and the Battle of Ullais, fought in the mid of May, 633 AD. The Persian court, already disturbed by internal problems, was thrown into chaos. In the last week of May 633, the important city of Hira fell to the Muslims
Muslims
after their victory in the Siege of Hira. After resting his armies, in June 633 Khalid laid siege to the city of Al Anbar, which surrendered in July 633 after a siege lasting a few weeks. Khalid then moved towards the south, and conquered the city of Ein ul Tamr after the Battle of Ein ut Tamr in the last week of July. At this point, most of what is now Iraq
Iraq
was under Islamic control. Khalid got a call of help from northern Arabia at Daumat-ul-Jandal, where another Muslim
Muslim
Arab
Arab
general, Iyad ibn Ghanm, was trapped among the rebel tribes. Khalid went to Daumat-ul-jandal and defeated the rebels in the Battle of Daumat-ul-jandal in the last week of August 633. Returning from Arabia, he got news of the assembling of a large Persian army. He decided to defeat them all separately to avoid the risk of being defeated by a large unified Persian army. Four divisions of Persian and Christian
Christian
Arab
Arab
auxiliaries were present at Hanafiz, Zumiel, Sanni and Muzieh. Khalid divided his army in three units, and attacked the Persian forces in well coordinated attacks from three different sides at night, starting from the Battle of Muzieh, then the Battle of Sanni, and finally the Battle of Zumail
Battle of Zumail
during November 633. These devastating defeats ended Persian control over Mesopotamia, and left the Persian capital Ctesiphon
Ctesiphon
unguarded and vulnerable to Muslim attack. Before attacking the Persian capital, Khalid decided to eliminate all Persian forces in the south and west. He accordingly marched against the border city of Firaz, where he defeated the combined forces of the Sassanid
Sassanid
Persians, the Byzantines and Christian Arabs in the Battle of Firaz
Battle of Firaz
in December 633. This was the last battle in his conquest of Mesopotamia. While Khalid was on his way to attack Qadissiyah (a key fort in the way to the Persian capital Ctesiphon), he received a letter from Caliph
Caliph
Abu Bakr
Abu Bakr
and was sent to the Roman front in Syria
Syria
to assume the command of the Muslim
Muslim
armies to conquer Roman Syria.[23] Second invasion of Mesopotamia
Mesopotamia
(634–636)[edit] Battle of the Bridge[edit] Main article: Battle of the Bridge According to the will of Abu Bakr, Umar
Umar
was to continue the conquest of Syria
Syria
and Mesopotamia. On the northeastern borders of the Empire, in Mesopotamia, the situation was deteriorating day by day. During Abu Bakr's era, Khalid ibn al-Walid
Khalid ibn al-Walid
had been sent to the Syrian front to command the Islamic armies there. As soon as Khalid had left Mesopotamia
Mesopotamia
with half his army of 9000 soldiers, the Persians decided to take back their lost territory. The Muslim
Muslim
army was forced to leave the conquered areas and concentrate on the border areas. Umar immediately sent reinforcements to aid Muthanna ibn Haritha in Mesopotamia
Mesopotamia
under the command of Abu Ubaid al-Thaqafi.[3] At that time, a series of battles between the Persians and Arabs occurred in the region of Sawad, such as Namaraq, Kaskar and Baqusiatha in which Arabs managed to push back and maintain presence in the area.[24] Later on, the Persian forces defeated Abu Ubaid in the Battle of the Bridge. However, later Persian forces were defeated by Muthanna bin Haritha in the Battle of Buwayb. In 635 Yazdgerd III
Yazdgerd III
sought alliance with Emperor Heraclius
Heraclius
of the Eastern Roman Empire. Heraclius
Heraclius
married his daughter (or, according to some traditions, his granddaughter) to Yazdegerd III, an old Roman tradition to show alliance. While Heraclius
Heraclius
prepared for a major offence in the Levant, Yazdegerd, meanwhile, ordered the concentration of massive armies to push back the Muslims
Muslims
from Mesopotamia
Mesopotamia
for good. The goal was well-coordinated attacks by both emperors, Heraclius
Heraclius
in the Levant
Levant
and Yazdegerd in Mesopotamia, to annihilate the power of their common enemy, Caliph Umar. Battle of Qadisiyyah[edit]

The site of the Battle of Qadisiyyah, showing Muslim
Muslim
army (in red) and Sassanid
Sassanid
army (in blue)

Main article: Battle of Qadisiyyah Umar
Umar
ordered his army to retreat to the bordering areas of Mesopotamia near the Arabian desert and began raising armies for another campaign into Mesopotamia. The Arab
Arab
armies were concentrated near Medina, and owing to the critical situation Umar
Umar
wished to command the army in person. This idea was opposed by the members of Majlis ash-Shura at Medina, who claimed that the two-front war required Umar's presence in Madinah. Umar
Umar
appointed Saad ibn Abi Waqqas
Saad ibn Abi Waqqas
as commander for the campaign in Mesopotamia. Even though Saad was suffering from sciatica, yet still Umar
Umar
thought this important invasion should be commanded by someone who is senior and respected in military chain of command.[25] Saad left Medina
Medina
with his army in May 636 and arrived at Qadisiyyah in June. While Heraclius
Heraclius
launched his offensive in May 636, Yazdegerd was unable to muster his armies in time to provide the Byzantines with Persian support. Umar, allegedly aware of this alliance, capitalized on this failure: not wanting to risk a battle with two great powers simultaneously, he quickly moved to reinforce the Muslim
Muslim
army at Yarmouk to engage and defeat the Byzantines. Meanwhile, Umar
Umar
ordered Saad to enter into peace negotiations with Yazdegerd III
Yazdegerd III
and invite him to Islam
Islam
to prevent Persian forces from taking the field. Heraclius
Heraclius
instructed his general Vahan not to engage in battle with the Muslims
Muslims
before receiving explicit orders; however, fearing more Arab
Arab
reinforcements, Vahan attacked the Muslim
Muslim
army in the Battle of Yarmouk in August 636. Heraclius's Imperial army was routed.[26] With the Byzantine threat ended, the Sassanid Empire
Sassanid Empire
was still a formidable power with vast manpower reserves, and the Arabs soon found themselves confronting a huge Persian army with troops drawn from every corner of the empire and commanded by its foremost generals. Among the troops were fearsome war elephants that the Persian commander brought with him for the sole purpose of vanquishing the Muslims. Within three months, Saad defeated the Persian army in the Battle of al-Qādisiyyah, effectively ending Sassanid
Sassanid
rule west of Persia
Persia
proper.[27] This victory is largely regarded as a decisive turning point in Islam's growth: with the bulk of Persian forces defeated, Saad with his companions later conquered Babylon
Babylon
(Battle of Babylon
Babylon
(636)), Kūthā, Sābāṭ (Valashabad) and Bahurasīr (Veh-Ardashir). Ctesiphon, the Imperial capital of the Sassanid Empire, fell in March 637 after a siege of three months. Conquest of Mesopotamia
Mesopotamia
(636–638)[edit] In December 636, Caliph
Caliph
Umar
Umar
ordered Utbah ibn Ghazwan to head south to capture al-Ubulla (known as “port of Apologos” in the Periplus of the Erythraean Sea) and Basra, in order to cut ties between the Persian garrison there and Ctesiphon. Utbah ibn Ghazwan arrived in April 637, where he imposed a siege on the region which ended with Muslims' victory, and the withdrawal of the Persians to the Maysan region which was seized later on as well.[28] After the conquest of Ctesiphon, several detachments were immediately sent west to capture Circesium
Circesium
and Heet the forts at the border of the Byzantine Empire. Several fortified Persian armies were still active north-east of Ctesiphon
Ctesiphon
at Jalula
Jalula
and north of the Tigris
Tigris
at Tikrit and Mosul. After withdrawal from Ctesiphon, the Persian armies gathered at Jalaula north-east of Ctesiphon. Jalaula was a place of strategic importance because from here routes led to Mesopotamia, Khurasan and Azerbaijan. The Persian forces at Jalula
Jalula
were commanded by General Mihran. His deputy was General Farrukhzad, a brother of General Rustam, who had commanded the Persian forces at the Battle of al-Qadisiyyah. As instructed by the Caliph
Caliph
Umar, Saad reported everything to Umar. The Caliph
Caliph
decided to deal with Jalula
Jalula
first. His plan was first to clear the way to the north before taking any decisive action against Tikrit
Tikrit
and Mosul. Umar
Umar
appointed Hashim ibn Utbah to the expedition of Jalula
Jalula
and Abdullah ibn Muta'am to conquer Tikrit
Tikrit
and Mosul. In April 637, Hashim led 12,000 troops from Ctesiphon
Ctesiphon
to win a victory over the Persians at the Battle of Jalula. He then laid siege to Jalula
Jalula
for seven months. After seizing a victory at Jalula, Abdullah ibn Muta'am marched against Tikrit
Tikrit
and captured the city after fierce resistance and with the help of Christians.[citation needed] He next sent an army to Mosul
Mosul
which surrendered on the terms of the Jizya. With victory at Jalula
Jalula
and occupation of the Tikrit- Mosul
Mosul
region, Muslim
Muslim
rule in Mesopotamia
Mesopotamia
was established. After the conquest of Jalula, a Muslim
Muslim
force under Qa'qa marched in pursuit of the Persians. The Persian army that escaped from Jalaula took its position at Khaniqeen 25 kilometres (15 mi) from Jalula
Jalula
on the road to Iran, under the command of General Mihran. Qa'qa defeated the Persian forces in the Battle of Khaniqeen and captured the city of Khaniqeen. The Persians withdrew to Hulwan. Qa'qa moved to Hulwan
Hulwan
and laid siege to the city which was captured in January 638.[29] Qa'qa sought permission for operating deeper into Persian land, i.e. mainland Iran, but caliph Umar
Umar
didn't approve the proposal and wrote a historic letter to Saad saying:

I wish that between the Suwad and the Persian hills there were walls which would prevent them from getting to us, and prevent us from getting to them.[30] The fertile Suwad is sufficient for us; and I prefer the safety of the Muslims
Muslims
to the spoils of war.

Raids of Persians in Mesopotamia
Mesopotamia
(638–641)[edit] By February 638 there was a lull in the fighting on the Persian front. The Suwad, the Tigris
Tigris
valley, and the Euphrates
Euphrates
valley were now under the complete control of the Muslims. The Persians had withdrawn to Persia
Persia
proper, east of the Zagros mountains. The Persians continued raiding Mesopotamia, which remained politically unstable. Nevertheless, it appeared as if this was going to be the dividing line between the Rashidun Caliphate
Rashidun Caliphate
and the Sassanids. In the later part of the year 638 Hormuzan, who commanded one of the Persian corps at the Battle of Qadisiyyah
Battle of Qadisiyyah
and was one of the seven great chiefs of Persia, intensified his raids in Mesopotamia, Saad according to Umar's instructions undertook offensive actions against Hormuzan
Hormuzan
and Utbah ibn Ghazwan aided by Nouman ibn Muqarin attacked Ahvaz
Ahvaz
and forced Hormuzan
Hormuzan
to enter into a peace treaty with the Muslims
Muslims
according to which Ahvaz
Ahvaz
would remain in Hormuzan's possession and he would rule it as a vassal of the Muslims
Muslims
and would pay tribute. Hormuzan
Hormuzan
broke the treaty and revolted against the Muslims. Umar
Umar
sent Abu Musa Ashaari, governor of Busra
Busra
to deal with Hormuzan. Hormuzan
Hormuzan
was defeated and sought once again for peace. Umar
Umar
accepted the offer and Hormuzan
Hormuzan
was again made vassal of the Muslims. This peace also proved short-lived once Hormuzan
Hormuzan
was reinforced by the fresh Persian troops sent by Emperor Yazdgerd III
Yazdgerd III
in late 640. The troops concentrated at Tuster north of Ahvaz. Umar
Umar
sent Governor of Kufa, Ammar ibn Yasir, governor of Busra
Busra
Abu Musa, and Nouman ibn Muqarin towards Tustar
Tustar
where Hormuzan
Hormuzan
was defeated, captured and sent to Madinah
Madinah
to Caliph
Caliph
Umar, where he apparently converted to Islam. He remained a useful adviser of Umar
Umar
throughout the campaign of conquest of Persia. He is also considered to be the mastermind behind the assassination of Caliph Umar
Umar
in 644. After the victory at Tustar, Abu Musa marched against Susa, a place of military importance, in January 641, which was captured after a siege of a couple of months. Next Abu Musa marched against Junde Sabur, the only place left of military importance in the Persian province of Khuzistan
Khuzistan
which surrendered to the Muslims
Muslims
after a siege of a few weeks.[31] Battle of Nahavand
Battle of Nahavand
(642)[edit] Main article: Battle of Nahavand After the conquest of Khuzistan, the Caliph
Caliph
Umar
Umar
wanted peace. Though considerably weakened, the image of the Persian Empire as a fearsome superpower still resonated in the minds of the newly-ascendant Arabs, and Umar
Umar
was wary of unnecessary military engagement with the Iranians. He wanted to leave the rest of Persia
Persia
to the Iranians. Umar said:

I wish there was a mountain of fire between us and the Iranians, so that neither they could get to us, nor we to them.[32]

However, the pride of the imperial Persians had been hurt by the conquest of their land by the Arabs. They could not acquiesce in the occupation of their lands by the Arabs.[33]

A Sassanid
Sassanid
army helmet.

After the defeat of the Persian forces at the Battle of Jalula
Battle of Jalula
in 637, Emperor Yazdgerd III
Yazdgerd III
went to Rey and from there moved to Merv
Merv
where he set up his capital. From Merv, he directed his chiefs to conduct continuous raids in Mesopotamia
Mesopotamia
to destabilize the Muslim
Muslim
rule. Within the next four years, Yazdgerd III
Yazdgerd III
felt powerful enough to challenge the Muslims
Muslims
once again for the throne of Mesopotamia. The Emperor sent a call to his people to drive away the Muslims
Muslims
from their lands. In response to the call, hardened veterans and young volunteers from all parts of Persia
Persia
marched in large numbers to join the imperial standard and marched to Nihawand
Nihawand
for the last titanic struggle between the forces of the Caliphate
Caliphate
and Sassanid
Sassanid
Persia. 100,000 Persian fighters assembled, commanded by Mardan Shah. The Governor of Kufa, Ammar ibn Yasir, received intelligence of the Persian movements and concentration at Nihawand. He reported the matter to Umar. Although Umar
Umar
had expressed a desire for Mesopotamia to be his easternmost frontier, he felt compelled to act given the concentration of the Persian army at Nihawand.[34] He believed that as long as Persia
Persia
proper remained under Sassanid
Sassanid
rule, Persian forces would continue raiding Mesopotamia
Mesopotamia
with a view to one day recapturing the region. Hudheifa ibn Al Yaman was appointed commander of the forces of Kufa, and was ordered to march to Nihawand. Governor of Busra
Busra
Abu Musa, was to march to Nihawand
Nihawand
commanding his forces of Busra
Busra
Nouman ibn Muqarrin marched from Ctesiphon
Ctesiphon
to Nihawand
Nihawand
while Umar
Umar
decided to lead the army concentrated at Madinah
Madinah
in person and command the Muslims
Muslims
at the battle. Umar's decision to command the army in person was not well received by the members of Majlis al Shura at Madinah. It was suggested that Umar
Umar
should command the campaign from Madinah, and should appoint an astute military commander to lead the Muslims
Muslims
at Nihawand. Umar
Umar
appointed Mugheera ibn Shuba as commander of the forces concentrated at Madinah
Madinah
and appointed Nouman ibn Muqarrin as commander in chief of the Muslims
Muslims
at Nihawand. The Muslim
Muslim
army left for Nihawand
Nihawand
and first concentrated at Tazar, and then moved to Nihawand
Nihawand
and defeated the Persian forces at the Battle of Nihawand
Nihawand
in December 642. Nouman died in action, and as per Umar's instructions Hudheifa ibn Al Yaman became new commander in chief. After the victory at Nihawand, the Muslim
Muslim
army captured the whole district of Hamadan after feeble resistance by the Persians.[32] Conquest of Persia
Persia
(642–651)[edit] After several years, Caliph
Caliph
Umar
Umar
adopted a new offensive policy,[35] preparing to launch a full-scale invasion of what remained of the Sassanid
Sassanid
Empire. The Battle of Nihawand
Nihawand
was one of the most decisive battles in Islamic history[36] and proved to be the key to Persia. After the devastating defeat at Nihawand, the last Sassanid
Sassanid
emperor, Yazdegerd III, fled to different parts of Persia
Persia
to raise a new army, with limited degrees of success, with Umar
Umar
trying to capture him. Strategic planning for the conquest of Persia[edit] Umar
Umar
decided to strike the Persians immediately after their defeat at Nihawand, when he had gained a psychological advantage over them. Umar had to decide which of the following three to conquer first: Fars in the south, Azerbaijan in the north or Isfahan
Isfahan
in the center. Umar chose Isfahan, as it was the heart of the Persian Empire and a conduit for supply and communication lines between Sassanid
Sassanid
garrisons in various Persian provinces. In other words, capturing Isfahan
Isfahan
would isolate Fars and Azerbaijan from Khurasan. After having captured the heartland of Persia, that is Fars and Isfahan, the next attacks would be simultaneously launched against Azerbaijan, the North Western province, and Sistan, the most eastern province of the Persian Empire.[36] The conquest of those provinces would leave Khorasan, the stronghold of Emperor Yazdegerd III, isolated and vulnerable. In the last phase of this campaign, Khorasan was to be attacked, completing the conquest of Sassanid
Sassanid
Persia. The plan was formulated and preparations were completed by January 642. The success of plan depended upon how effectively Umar
Umar
would be able to coordinate these attacks from Madinah, about 1500 kilometers from the battlefields in Persia
Persia
and upon the skills and abilities of his field commanders. Umar
Umar
appointed his best field commanders to conquer the Sassanid Empire
Sassanid Empire
and bring down his most formidable foe, Yazdegerd III. The campaign saw a different pattern in command structure. Instead of appointing a single field commander to campaign across the Persian lands, Umar
Umar
appointed several commanders, each assigned a different mission. Once the mission would end the commander would become an ordinary soldier under the command of the new field commander for the latter's mission. The purpose of this strategy was to allow commanders to mix in with their soldiers and to remind them that they are like everyone else; command is only given to those most competent, and once the battle is over, the commander returns to his previous position. In 638, Caliph
Caliph
Umar
Umar
dismissed Khalid, who chose not to rebel against the dismissal. In 642 at the eve of the conquest of Persia, Umar, wanting to give a moral boost to his troops, decided to reinstall Khalid as new field commander against Persia.[36] Khalid's reputation as the conqueror of Eastern Roman provinces demoralized the Persian commanders, most of whom had already been defeated by him during his conquest of Mesopotamia
Mesopotamia
in 633. Umar
Umar
wanted a decisive victory early in the campaign to boost the morale of his troops, while demoralizing the Persians. Before Umar could issue orders of reappointment, Khalid, residing in Emesa, died. In various campaigns in Persia, Umar
Umar
even appointed the commanders of the wings, the center and the cavalry of the army. Umar
Umar
strictly instructed his commanders to consult him before making any decisive move in Persia. All the commanders, before starting their assigned campaigns, were instructed to send a detailed report of the geography and terrain of the region and the position of the Persian garrisons, forts, cities and troops in it. Umar
Umar
then would send them a detailed plan of how he wanted this region to be captured. Only the tactical issues were left to the field commanders to be tackled in accordance with the situation they faced at their fronts.[37] Umar
Umar
appointed the best available and well reputed commanders for the campaign.[36][38] Conquest of Central Iran[edit]

The ziggurat of Choqa Zanbil
Choqa Zanbil
in Khuzestan

The preparation and planning of the conquest of the Persian Empire was completed by early 642. Umar
Umar
appointed Abdullah ibn Uthman, commander of the Muslim
Muslim
forces, to invade Isfahan. From Nihawand, Nu'man marched to Hamadan, which was already in Muslim
Muslim
hands. Once Hamadan
Hamadan
was captured, Nu'man marched 370 kilometres (230 mi) southeast against the city Isfahan
Isfahan
and defeated an Sasanian army under the command of Shahrvaraz Jadhuyih and other notable Sasanian generals. Shahrvaraz Jadhuyih, along with another Sasanian general was killed during the battle.[39] After his victory at Isfahan, he laid siege to the city; there the Muslim
Muslim
army was reinforced by fresh troops from Busra
Busra
and Kufa
Kufa
under the command of Abu Musa Ashaari and Ahnaf ibn Qais.[40] The siege continued for a few months and finally the city surrendered. In 651, Nu'aym marched northeast to Rey, Iran, about 320 kilometres (200 mi) from Hamadan, and laid siege to the city, which surrendered after fierce resistance. Nu'aym then marched 240 kilometres (150 mi) northeast towards Qom, which was captured without much resistance. This was the outermost boundary of the Isfahan
Isfahan
region. Further northeast of it was Khurasan, and southeast of it lay Sistan. Meanwhile, Hamadan
Hamadan
and Rey had rebelled. Umar
Umar
sent Nu'aym ibn Muqaarin, brother of late Nu'man ibn Muqaarin, who was the Muslim
Muslim
commander at Nihawand, to crush the rebellion and to clear the westernmost boundaries of Isfahan. Nu'aymm marched towards Hamadan from Isfahan. A bloody battle was fought and Hamadan
Hamadan
was recaptured by the Muslims. Nu'aym next moved to Rey. There too the Persians resisted and were defeated outside the fort, and the city was recaptured by the Muslims.[41] The Persian citizens sought for peace and agreed to pay the Jizya. From Rey, Nu'aym moved north towards Tabaristan, which lay south of the Caspian Sea.[41] The ruler of Tabaristan
Tabaristan
then signed a peace treaty with the Caliphate. Conquest of Fars[edit] First Muslim
Muslim
invasion and the successful Sasanian counter-attack[edit] The Muslim
Muslim
invasion of Fars began in 638/9, when the Rashidun governor of Bahrain, al-'Ala' ibn al-Hadrami, after having defeated some rebellious Arab
Arab
tribes, seized an island in the Persian Gulf. Although al-'Ala' and the rest of the Arabs had been ordered to not invade Fars or its surrounding islands, he and his men continued their raids into the province. Al-'Ala quickly prepared an army which was divided into three groups, one under al-Jarud ibn Mu'alla, the second under al-Sawwar ibn Hammam and the third under Khulayd ibn al-Mundhir ibn Sawa. When the first group entered Fars, it was quickly defeated and al-Jarud was killed. The same thing soon happened to the second group. However, things proved to be more fortunate with the third group; Khulayd managed to keep them on bay, but was unable to withdraw back to Bahrain
Bahrain
as the Sassanians were blocking his way at the sea. Umar, founding out about al-'Ala's invasion of Fars, had him replaced with Sa'd ibn Abi Waqqas as the governor of Bahrain. Umar
Umar
then ordered Utbah ibn Ghazwan to send reinforcements to Khulayd. When the reinforcements arrived, Khulayd and some of his men managed successfully to withdraw back to Bahrain, while the rest withdrew to Basra. Second and last Muslim
Muslim
invasion[edit] In ca. 643, Uthman ibn Abi al-'As seized Bishapur, and made a peace treaty with the inhabitants of the city. In 644, al-'Ala' once again attacked Fars from Bahrain, reaching as far as Estakhr, until he was repelled by the governor (marzban) of Fars, Shahrag. Some time later, Uthman ibn Abi al-'As managed to establish a military base at Tawwaj, and shortly defeated and killed Shahrag near Rew-shahr (however other sources states that it was his brother who did it). A Persian convert to Islam, Hormoz ibn Hayyan al-'Abdi, was shortly sent by Uthman ibn Abi al-'As to attack a fortress known as Senez on the coast of Fars. After the accession of Uthman ibn Affan
Uthman ibn Affan
as the new Rashidun Caliph
Caliph
on 11 November, the inhabitants of Bishapur
Bishapur
under the leadership of Shahrag's brother declared independence, but were defeated. However the date for this revolt mains disputed, as the Persian historian al-Baladhuri states that it occurred in 646. In 648, 'Abd- Allah
Allah
ibn al-'Ash'ari forced the governor of Estakhr, Mahak, to surrender the city. However, this was not the final conquest of Estakhr, as the inhabitants of the city would later rebel in 649/650 while its newly appointed governor, 'Abd- Allah
Allah
ibn 'Amir was trying to capture Gor. The military governor of the province, 'Ubayd Allah
Allah
ibn Ma'mar, was defeated and killed. In 650/651, Yazdegerd went to Estakhr
Estakhr
and tried to plan an organized resistance against the Arabs, and after some time he went to Gor, but Estakhr
Estakhr
failed to put up a strong resistance, and was soon sacked by the Arabs, who killed over 40,000 defenders. The Arabs then quickly seized Gor, Kazerun
Kazerun
and Siraf, while Yazdegerd III
Yazdegerd III
fled to Kerman. This ended the Muslim conquest of Pars, although the inhabitants of the province would later rebel several times against the Arabs. Conquest of Southeastern Persia
Persia
( Kerman
Kerman
and Makran)[edit]

Sassanid
Sassanid
era horse head found in Kerman

The expedition to Kerman
Kerman
was sent roughly at the same time when the expeditions to Sistan
Sistan
and Azerbaijan were sent. Suhail ibn Adi was given command of this expedition. Suhail marched from Busra
Busra
in 643; passing from Shiraz
Shiraz
and Persepolis
Persepolis
he joined with other Muslim
Muslim
armies and marched against Kerman, which was subdued after a pitched battle with local garrisons. Conquest of Sakastan[edit]

Map of Sakastan
Sakastan
under the Sasanians

Already during the reign of Umar, Sakastan
Sakastan
suffered from raids by the Arabs. However, the first real invasion took place in 650, when Abd- Allah
Allah
ibn Amir, after having secured his position in Kerman, sent an army under Mujashi ibn Mas'ud to Sakastan. After having crossed the Dasht-i Lut
Dasht-i Lut
desert, Mujashi ibn Mas'ud arrived to Sakastan. However, he suffered a heavy defeat and was forced to retreat.[42] One year later, Abd-Allah ibn Amir sent an army under Rabi ibn Ziyad Harithi to Sakastan. After some time, he reached Zaliq, a border town between Kirman and Sakastan, where he forced the dehqan of the town to acknowledge Rashidun authority. He then did the same at the fortress of Karkuya, which had a famous fire temple, which is mentioned in the Tarikh-i Sistan.[43] He then continued to seize more land in the province. He thereafter besieged the capital Zrang, and after a heavy battle outside the city, its governor Aparviz surrendered. When Aparviz went to Rabi ibn Ziyad to discuss about the conditions of a treaty, he saw that he was using the bodies of two dead soldiers as a chair. This horrified Aparviz, who in order to spare the inhabitants of Sakastan
Sakastan
from the Arabs, made peace with them in return for a heavy tribute of 1 million dirhams, including 1,000 slave boys (or girls) bearing 1,000 golden vessels.[43][44] Rabi ibn Ziyad was then appointed as the governor of province.[45] 18 months later, Rabi was summoned to Basra, and was replaced by 'Abd al-Rahman ibn Samura as governor. The inhabitants of Sakastan
Sakastan
used this opportunity to rebel and defeat the Muslim
Muslim
garrison of Zrang. When 'Abd al-Rahman ibn Samura reached Sakastan, he suppressed the rebellion and defeated the Zunbils
Zunbils
of Zabulistan, seizing Bust and a few cities in Zabulistan.[43][45] Conquest of Azerbaijan[edit]

Sassanid
Sassanid
fortress in Derbent. It fell to the Muslims
Muslims
in 643.

The conquest of Iranian Azerbaijan
Iranian Azerbaijan
started in 651.[46] It was part of a simultaneous attack launched against the north, south and east of Persia, after capturing Isfahan
Isfahan
and Fars. These coordinated multi-pronged attacks by Caliph
Caliph
Umar
Umar
paralyzed the whole of what then remained of the Persian Empire. Expeditions were sent against Kerman and Makran in the southeast, against Sistan
Sistan
in the northeast and against Azerbaijan in the northwest. Hudheifa ibn Al Yaman was appointed commander to conquer Azerbaijan. Hudheifa marched from Rey in central Persia
Persia
to Zanjan, a stronghold of the Persians in the north. Zanjan was a well defended fortified town. The Persians came out of the city and gave battle. Hudheifa defeated the Persian garrison and captured the city, and according to Caliph
Caliph
Umar's order, the civilians who sought for peace were given peace on the usual terms of the Jizya.[47] From Zanjan, Hudheifa marched to Ardabil
Ardabil
which surrendered peacefully and Hudheifa continued his march north along the western coast of the Caspian Sea
Caspian Sea
and captured Bab al-Abwab
Bab al-Abwab
by force.[38] At this point Hudheifa was recalled by Caliph
Caliph
Umar, with Bukair ibn Abdullah and Utba ibn Farqad succeeding him. They were sent to carry out a two pronged attack against Azerbaijan: Bukair was to march north along the western coast of the Caspian Sea
Caspian Sea
while Uthba was to march directly into the heart of Azerbaijan. On his way north Bukair was halted by a large Persian force under Isfandiyar, the son of Farrukhzad. A pitched battle was fought, after which Isfandiyar was defeated and captured. In return for the safety of his life, he agreed to surrender his estates in Azerbaijan and persuade others toward submission to Muslim
Muslim
rule.[41] Uthba ibn Farqad then defeated Bahram, brother of Isfandiyar. He too sought for peace. A pact was drawn according to which Azerbaijan was surrendered to Caliph
Caliph
Umar
Umar
on usual terms of paying the annual Jizya. The expedition commenced some time in late 651. Conquest of Armenia[edit]

View of Tbilisi, which fell to the Rashidun Caliphate
Rashidun Caliphate
in 644.

See also: Muslim conquest
Muslim conquest
of Armenia, Persian Armenia, and Marzpanate Armenia Byzantine Armenia
Byzantine Armenia
was already conquered in 638–639. Persian Armenia lay north of Azerbaijan. By now, except for Khurasan and Armenia, the whole of the Persian Empire was under Umar's control and Emperor Yazdegred III was on the run. However, Umar
Umar
refused to take any chances; he never perceived the Persians as being weak and weary. The fact that Umar
Umar
didn't underestimate the Persians is the secret behind the brilliant and speedy conquest of the Persian Empire. Again Umar decided to send simultaneous expeditions to the far north-east and north-west of the Persian Empire. An expedition was sent to Khurasan in late 643 and at the same time an expedition was launched against Armenia. Bukair ibn Abdullah, who had recently subdued Azerbaijan, was assigned a mission to capture Tiflis. From Bab at the western coast of the Caspian Sea, Bukair continued his march north. Umar
Umar
decided to practice his traditional and successful strategy of multi-pronged attacks. While Bukair was still kilometres away from Tiflis, Umar instructed him to divide his army into three corps. Umar
Umar
appointed Habib ibn Muslaima to capture Tiflis, Abdulrehman to march north against the mountains and Hudheifa to march against the southern mountains. Habib captured Tiflis
Tiflis
and the region up to the eastern coast of the Black Sea. Abdulrehman marched north to the Caucasus Mountains and subdued the tribes. Hudheifa marched south-west to the mountainous region and subdued the local tribes. The advance into Armenia
Armenia
came to an end with the death of Caliph
Caliph
Umar
Umar
in November 644. By then almost the whole of the South Caucasus
Caucasus
was captured.[48] Conquest of Khorasan[edit]

Further information: Islamic conquest of Turkestan, Islamic conquest of Afghanistan, and History of Arabs in Afghanistan Khorasan was the second largest province of the Sassanid
Sassanid
Empire. It stretched from what is now northeastern Iran, northwestern Afghanistan and southern Turkmenistan. Its capital was Balkh, in northern Afghanistan. In 651 the mission of conquering Khurasan was assigned to Ahnaf ibn Qais.[38] Ahnaf marched from Kufa
Kufa
and took a short and less frequented route via Rey and Nishapur. Rey was already in Muslim
Muslim
hands and Nishapur
Nishapur
surrendered without resistance. From Nishapur
Nishapur
Ahnaf marched to Herat
Herat
which is in western Afghanistan. Herat
Herat
was a fortified town, the Siege of Herat
Herat
lasted for a few months before surrendering. With the surrender of Herat, the whole of southern Khurasan came under Muslim
Muslim
control. With Herat
Herat
under his firm control, Ahnaf marched north directly to Merv, in present Turkmenistan.[49] Merv
Merv
was the capital of Khurasan and here Yazdegred III held his court. On hearing of the Muslim
Muslim
advance, Yazdegred III left for Balkh. No resistance was offered at Merv, and the Muslims
Muslims
occupied the capital of Khurasan without firing a shot. Ahnaf stayed at Merv
Merv
and waited for reinforcement from Kufa. Meanwhile, Yazdgird had also gathered considerable power at Balkh
Balkh
and also sought alliance with the Khan of Farghana, who personally led the Turkish contingent to help Yazdegred III. Umar
Umar
ordered that Yazdgird's allied forces should be weaken by breaking up the alliance with the Turks. Ahnaf successfully broke up the alliance and the Khan of Farghana
Farghana
pulled back his forces realizing that fighting against the Muslims
Muslims
was not a good idea and that it might endanger his own kingdom. Yazdgird's army was defeated at the Battle of Oxus River and retreated across the Oxus
Oxus
to Transoxiana. Yazdegred III had a narrow escape and fled to China. Balkh
Balkh
was occupied by the Muslims, and with this occupation the Persian war was over. The Muslims
Muslims
had now reached the outermost frontiers of Persia. Beyond that lay the lands of the Turks and still further lay China. The old mighty empire of the Sassanids had ceased to exist. Ahnaf returned to Marv and sent a detail report of operations to Umar, a historic letter Umar
Umar
was anxiously waiting for, subject of which was the downfall of the Persian Empire, and with which permission was sought to cross the Oxus
Oxus
river and invade Transoxiana. Umar
Umar
ordered Ahnaf to desist and instead to consolidate his power south of Oxus. Persian rebellion and reconquest[edit] Caliph
Caliph
Umar
Umar
was assassinated in November 644 by a Persian slave named Piruz Nahavandi. The assassination is often seen by various historians as a Persian conspiracy against Umar.[38] Hormuzan
Hormuzan
is said to have masterminded this plot. Caliph
Caliph
Uthman ibn Affan
Uthman ibn Affan
(644–656) succeeded Umar. During his reign almost the whole of the former Sassanid empire's territory rebelled from time to time until 651, until the last Sassanid
Sassanid
emperor was assassinated near Merv
Merv
ending the Sassanid dynasty and Persian resistance to the Muslims. Caliph
Caliph
Uthman therefore had to send several military expeditions to crush the rebellions and recapture Persia
Persia
and their vassal states. The Empire expanded beyond the borders of the Sassanid Empire
Sassanid Empire
in Transoxiana, Baluchistan and the Caucasus. The main rebellion was in the Persian provinces of Armenia, Azerbaijan, Fars, Sistan
Sistan
(in 649), Khorasan (651), and Makran (650).[50] End of the Sassanid
Sassanid
dynasty[edit] Yazdegerd III, after being defeated in several battles, was unable to raise another army and became a hunted fugitive. He kept fleeing from one district to another until a local miller killed him for his purse at Merv
Merv
in 651.[51] For many decades to come, this was the easternmost limit of Muslim
Muslim
rule. Persia
Persia
under Muslim
Muslim
rule[edit]

Rashidun Empire
Rashidun Empire
at its peak under the third Rashidun Caliph, Uthman, in 654   Dominion of the Rashidun Caliphate .

See also: Islamization of Iran
Iran
and Islam
Islam
in Iran According to Bernard Lewis:

Arab Muslims
Arab Muslims
conquests have been variously seen in Iran: by some as a blessing, the advent of the true faith, the end of the age of ignorance and heathenism; by others as a humiliating national defeat, the conquest and subjugation of the country by foreign invaders. Both perceptions are of course valid, depending on one's angle of vision… Iran
Iran
was indeed Islamized, but it was not Arabized. Persians remained Persians. And after an interval of silence, Iran
Iran
reemerged as a separate, different and distinctive element within Islam, eventually adding a new element even to Islam
Islam
itself. Culturally, politically, and most remarkable of all even religiously, the Iranian contribution to this new Islamic civilization is of immense importance. The work of Iranians can be seen in every field of cultural endeavor, including Arabic
Arabic
poetry, to which poets of Iranian origin composing their poems in Arabic
Arabic
made a very significant contribution. In a sense, Iranian Islam
Islam
is a second advent of Islam
Islam
itself, a new Islam
Islam
sometimes referred to as Islam-i Ajam. It was this Persian Islam, rather than the original Arab
Arab
Islam, that was brought to new areas and new peoples: to the Turks, first in Central Asia
Central Asia
and then in the Middle East in the country which came to be called Turkey, and of course to India. The Ottoman Turks brought a form of Iranian civilization to the walls of Vienna.[52]

Administration[edit] Under Umar
Umar
and his immediate successors, the Arab
Arab
conquerors attempted to maintain their political and cultural cohesion despite the attractions of the civilizations they had conquered. The Arabs initially settled in the garrison towns rather than on scattered estates. The new non- Muslim
Muslim
subjects were protected by the state and known as dhimmi (meaning protected), and were to pay a special tax, the jizya (tribute), which was calculated per individual at varying rates, usually two dirhams for able bodied men of military age, in return for their exemption from military services. Women and children were exempted from the jizya.[53] Mass conversions were neither desired nor allowed, at least in the first few centuries of Arab rule[54][55][56] Caliph
Caliph
Umar
Umar
had liberal policies towards dhimmis. These policies were adopted to make the conquered less prone to rise up against their new masters and thus making them more receptive to Arab
Arab
colonization.[citation needed] Umar
Umar
is reported to have issued the following instructions about the protected people:

Make it easy for him, who can not pay tribute; help him who is weak, let them keep their titles, but do not give them our kuniyat (Arabic traditional nicknames or titles).[57]

Umar's liberal policies were continued by at least his immediate successors. In his dying charge to his successor he is reported to have said:

I charge the caliph after me to be kind to the dhimmis, to keep their covenant, to protect them and not to burden them over their strength.[57]

Practically the jizya replaced poll taxes imposed by the Sassanids, which tended to be much higher than the jizya. In addition to the jizya the old Sassanid
Sassanid
land tax (Known in Arabic
Arabic
as Kharaj) was also adopted. Caliph
Caliph
Umar
Umar
is said to have occasionally set up a commission to survey the taxes in order to check that they wouldn't be more than the land could bear.[58] It is narrated that Zoroastrians
Zoroastrians
were subjected to humiliation and ridicule when paying the jizya in order to make them feel inferior.[59] For at least under Rashiduns and early Ummayads, the administrative system of the late Sassanid
Sassanid
period was largely retained. This was a pyramidal system where each quarter of the state was divided into provinces, the provinces into districts, and the districts into sub-districts. Provinces were called ustan ( Middle Persian
Middle Persian
ostan), the districts shahrs, centered upon a district capital known as shahristan. The subdistricts were called tasok in Middle Persian, which was adopted as tassuj (plural tasasij) into Arabic. Religion[edit] See also: Islamization of Iran, Persecution of Zoroastrians, and Islamic Missionary Activity After the Muslim conquest
Muslim conquest
of Persia, Zoroastrians
Zoroastrians
were given dhimmi status and subjected to persecutions; discrimination and harassment began in the form of sparse violence.[60][61] Zoroastrians
Zoroastrians
were made to pay an extra tax called jizya, failing which they were either killed, enslaved or imprisoned. Those paying jizya were subjected to insults and humiliation by the tax collectors.[62][63][64] Zoroastrians
Zoroastrians
who were captured as slaves in wars were given their freedom if they converted to Islam.[62][65] Muslim
Muslim
leaders in their effort to win converts encouraged attendance at Muslim
Muslim
prayer with promises of money and allowed the Quran
Quran
to be recited in Persian instead of Arabic
Arabic
so that it would be intelligible to all.[66] Islam
Islam
was readily accepted by Zoroastrians
Zoroastrians
who were employed in industrial and artisan positions because, according to Zoroastrian dogma, such occupations that involved defiling fire made them impure.[66] Moreover, Muslim
Muslim
missionaries did not encounter difficulty in explaining Islamic tenets to Zoroastrians, as there were many similarities between the faiths. According to Thomas Walker Arnold, for the Persian, he would meet Ahura Mazda
Ahura Mazda
and Ahriman
Ahriman
under the names of Allah
Allah
and Iblis.[66] In Afghanistan, Islam
Islam
was spread due to Umayyad
Umayyad
missionary efforts particularly under the reign of Hisham ibn Abd al-Malik and Umar
Umar
ibn AbdulAziz.[66] There were also large and thriving Christian
Christian
and Jewish
Jewish
communities, along with smaller numbers of Buddhists and other groups. However, there was a slow but steady movement of the population towards Islam. The nobility and city-dwellers were the first to convert. Islam
Islam
spread more slowly among the peasantry and the dihqans, or landed gentry. By the late 10th century, the majority of the Persians had become Muslim. Until the 15th century, most Persian Muslims
Muslims
were Sunni Muslims[citation needed], though today Iran
Iran
is known as a stronghold of the Shi'a Muslim
Muslim
faith, recognizing Islam
Islam
as their religion and the prophet's son in law, Ali
Ali
as an enduring symbol of justice.[citation needed] According to Amoretti in Cambridge History of Islam, the Arab conquerors brought with them a new religion and a new language, but they did not use force to spread it. While giving freedom of choice, however, the Arab
Arab
conquerors designated privileges for those who converted.[67] Language of Persia[edit] During the Rashidun Caliphate, the official language of Persia (including Mesopotamia) remained Middle Persian
Middle Persian
(Pahlavi), just as the official languages of Syria
Syria
and Egypt
Egypt
remained Greek and Coptic. However, during the Ummayad Caliphate, the Ummayads imposed Arabic
Arabic
as the primary language of their subjected people throughout their empire, displacing their indigenous languages. Particularly, Al-Hajjaj ibn Yusuf (661–714) officially changed the administrative language of Iraq
Iraq
from Middle Persian
Middle Persian
(Pahlavi) to Arabic. Although an area from Iraq
Iraq
to Morocco
Morocco
speaks Arabic-based dialects to this day, Middle Persian proved to be much more enduring. Most of its structure and vocabulary survived, evolving into the New Persian. However, Persian did incorporate a certain amount of Arabic
Arabic
vocabulary, especially words pertaining to religion, and it switched from the Pahlavi scripts to a modified version of the Arabic
Arabic
alphabet.[68] Today Persian is spoken officially in Iran, Afghanistan, and Tajikistan. Urbanisation[edit] The Arab
Arab
conquest of Persia
Persia
led to a period of extreme urbanisation in Iran, starting with the ascension of the Abbasid dynasty and ending in the 11th century CE.[69] This was particularly true for the eastern parts of the country, for regions like Khorasan and Transoxiana.[70] During this period, Iran
Iran
saw the development of massive metropolises, some reaching population numbers of up to 200,000 people.[69] Before this period, the important Persian cities had been situated outside of Persia
Persia
proper, especially in Mesopotamia. This period of extreme urbanisation was followed in the 11th century by a collapse of the Iranian economy, which led to large scale emigrations of Iranians into Central Asia, India, the rest of the Middle East, and Anatolia. This catastrophe has been cited by some as reason for the Persian language becoming widespread throughout Central Asia
Central Asia
and large parts of the Middle East.[71] See also[edit]

Book: Muslim
Muslim
conquests

Arab-Byzantine Wars Arab
Arab
rule in Georgia Emirate of Tbilisi Fall of Sassanid
Sassanid
dynasty History of Arabs in Afghanistan History of Iran Islam
Islam
in Iran Islamic conquest of Afghanistan Islamization of Iran Military history of Iran Muslim
Muslim
conquests Muslim conquest
Muslim conquest
of Transoxiana Spread of Islam

References[edit]

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India
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az aghz ta saqut saltnat Pahlvi. Sukhan. ISBN 978-964-6961-11-1.  Daryaee, Touraj (2009). Sasanian Persia: The Rise and Fall of an Empire. I.B.Tauris. pp. 1–240. ISBN 0857716662.  Greatrex, Geoffrey; Lieu, Samuel N. C. (2002). The Roman Eastern Frontier and the Persian Wars (Part II, 363–630 AD). New York, New York and London, United Kingdom: Routledge (Taylor & Francis). ISBN 0-415-14687-9.  Pourshariati, Parvaneh (2008). Decline and Fall of the Sasanian Empire: The Sasanian-Parthian Confederacy and the Arab
Arab
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External links[edit]

History of Iran: Islamic Conquest from the Iran
Iran
Chamber Society. The Arab
Arab
conquests at History World. Muslim
Muslim
Conquest of Persia
Persia
at Mecca Books.

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