Seljuk Empire

The Great Seljuk Empire, or the Seljuk Empire was a high medieval, culturally Turko-Persian, Sunni Muslim empire, founded and ruled by the Qïnïq branch of Oghuz Turks. It spanned a total area of from Anatolia and the Levant in the west to the Hindu Kush in the east, and from Central Asia in the north to the Persian Gulf in the south.

The Seljuk Empire was founded in 1037 by Tughril (990–1063) and his brother Chaghri (989–1060), both of whom co-ruled over its territories; there are indications that the Seljuk leadership otherwise functioned as a triumvirate and thus included Musa Yabghu, the uncle of the aforementioned two. From their homelands near the Aral Sea, the Seljuks advanced first into Khorasan and into the Iranian mainland, where they would become largely based as a Persianate society. They then moved west to conquer Baghdad, filling up the power vacuum that had been caused by struggles between the Arab Abbasid Caliphate and the Iranian Buyid Empire. The subsequent Seljuk expansion into eastern Anatolia triggered the Byzantine–Seljuk wars, with the Battle of Manzikert in 1071 marking a decisive turning point in the conflict in favour of the Seljuks, undermining the authority of the Byzantine Empire in the remaining parts of Anatolia and gradually enabling the region's Turkification. The Seljuk Empire united the fractured political landscape in the non-Arab eastern parts of the Muslim world and played a key role in both the First Crusade and Second Crusade; it also played an important part in the creation and expansion of multiple art forms during the period in which they had influence.

By the 1140s, the Seljuk Empire began to decline in power and influence, and was eventually supplanted by the Khwarazmian Empire in 1194.

History

Founder of the dynasty

The founder of the Seljuq dynasty was an Oghuz Turkic warlord Seljuk. He was reputed to have served in the Khazar army, under whom, the Seljuks migrated to Khwarezm, near the city of Jend, where they converted to Islam in 985. Khwarezm, administered by the Ma'munids, was under the nominal control of the Samanid Empire. By 999 the Samanids fell to the Kara-Khanids in Transoxiana, but the Ghaznavids occupied the lands south of the Oxus. The Seljuks became involved, having supported the last Samanid emir against the Kara-Khanids, in this power struggle in the region before establishing their own independent base.

Expansion of the empire

Tughril and Chaghri

Oghuz Turks (also known as Turkmens at the time), led by Seljuq's son, Musa and his two nephews, Tughril and Chaghri, were one of several groups of the Oghuz who made their way to Iran between about 1020 and 1040, first moving south to Transoxiana, and then to Khorasan, initially at the invitation of the local rulers, then under alliances and conflicts. However, prior to the arrival of the Seljuks to Khorasan, other Oghuz Turks were already present in the area: that is, the northern slopes of Kopet Dag mountains, which is principally the region stretching from the Caspian Sea to Merv; what is today – Turkmenistan. Contemporary sources mention places such as Dahistan, Farawa and Nasa, as well as Sarakhs, all in present-day Turkmenistan.

Around 1034, Tughril and Chaghri were soundly defeated by the Oghuz Yabghu Ali Tegin and his allies, forcing them to escape from Transoxiana. Initially, Turkmens took refuge in Khwarazm, which served as one of their traditional pastures, but they were also encouraged by the local Ghaznavid governor, Harun, who hoped to utilise Seljuqs for his efforts to seize Khorasan from his sovereign. When Harun was assassinated by Ghaznavid agents in 1035, they again had to flee, this time heading south across the Karakum Desert. First, Turkmens made their way to the important city of Merv, but perhaps due to its strong fortification, they then changed their route westwards to take refuge in Nasa. Finally, they arrived on the edges of Khorasan, the province considered a jewel in the Ghaznavid crown.

After moving into Khorasan, Seljuks under Tughril wrested an empire from the Ghaznavids. Initially the Seljuks were repulsed by Mahmud and retired to Khwarezm, but Tughril and Chaghri led them to capture Merv and Nishapur (1037–1038). Later they repeatedly raided and traded territory with his successor, Mas'ud, across Khorasan and Balkh.

In 1040, at the Battle of Dandanaqan, Seljuqs decisively defeated Mas'ud I of Ghazni, forcing him to abandon most of his western territories. Afterwards, Turkmens employed Khorasanians and set up a Persian bureaucracy to administer their new polity with Toghrul as its nominal overlord. By 1046, Abbasid caliph al-Qa'im had sent Tughril a diploma recognizing Seljuk rule over Khurasan. In 1048–1049, the Seljuk Turks, commanded by Ibrahim Yinal, uterine brother of Tughril, made their first incursion into the Byzantine frontier region of Iberia and clashed with a combined Byzantine-Georgian army of 50,000 at the Battle of Kapetrou on 10 September 1048. The devastation left behind by the Seljuk raid was so fearful that the Byzantine magnate Eustathios Boilas described, in 1051–1052, those lands as "foul and unmanageable... inhabited by snakes, scorpions, and wild beasts." The Arab chronicler Ibn al-Athir reports that Ibrahim brought back 100,000 captives and a vast booty loaded on the backs of ten thousand camels. In 1055, Tughril entered Baghdad and removed the influence of the Buyid dynasty, under a commission from the Abbasid caliph.

Alp Arslan

Alp Arslan, the son of Chaghri Beg, expanded significantly upon Tughril's holdings by adding Armenia and Georgia in 1064 and invading the Byzantine Empire in 1068, from which he annexed almost all of Anatolia. Arslan's decisive victory at the Battle of Manzikert in 1071 effectively neutralized the Byzantine resistance to the Turkish invasion of Anatolia, although the Georgians were able to recover from Alp Arslan's invasion by securing the theme of Iberia. The Byzantine withdrawal from Anatolia brought Georgia in more direct contact with the Seljuks. In 1073 the Seljuk Amirs of Ganja, Dvin and Dmanisi invaded Georgia and were defeated by George II of Georgia, who successfully took the fortress of Kars. A retaliatory strike by the Seljuk Amir Ahmad defeated the Georgians at Kvelistsikhe.

Alp Arslan authorized his Turkmen generals to carve their own principalities out of formerly Byzantine Anatolia, as atabegs loyal to him. Within two years the Turkmens had established control as far as the Aegean Sea under numerous ''beghlik''s (modern Turkish beyliks): the Saltukids in Northeastern Anatolia, the Shah-Armens and the Mengujekids in Eastern Anatolia, Artuqids in Southeastern Anatolia, Danishmendis in Central Anatolia, Rum Seljuks (Beghlik of Suleyman, which later moved to Central Anatolia) in Western Anatolia, and the Beylik of Tzachas of Smyrna in İzmir (Smyrna).

Malik Shah I

Under Alp Arslan's successor, Malik Shah, and his two Persian viziers, Nizām al-Mulk and Tāj al-Mulk, the Seljuk state expanded in various directions, to the former Iranian border of the days before the Arab invasion, so that it soon bordered China in the east and the Byzantines in the west. Malikshāh was the one who moved the capital from Ray to Isfahan. The Iqta military system and the Nizāmīyyah University at Baghdad were established by Nizām al-Mulk, and the reign of Malikshāh was reckoned the golden age of "Great Seljuk". The Abbasid Caliph titled him "The Sultan of the East and West" in 1087. The Assassins (''Hashshashin'') of Hassan-i Sabāh started to become a force during his era, however, and they assassinated many leading figures in his administration; according to many sources these victims included Nizām al-Mulk.

In 1076, Malik Shah I surged into Georgia and reduced many settlements to ruins. From 1079/80 onward, Georgia was pressured into submitting to Malik-Shah to ensure a precious degree of peace at the price of an annual tribute.

Internally, the most prominent development of Malik Shah's rule was the continuous increase in the power of the Nizām al-Mulk. Some contemporary chroniclers refer to the period as "al-dawla al-Nizamiyya", the Nizam's state, while modern scholars have mentioned him as "the real ruler of the Seljuq empire". The 14-century biographer Subki claimed that Nizām al-Mulk's vizierate was "not just a vizierate, it was above the sultanate".

Ahmad Sanjar

Ahmad was the son of Malik Shah I and initially took part in wars of succession against his three brothers and a nephew: Mahmud I, Barkiyaruq, Malik Shah II and Muhammad I Tapar. In 1096, he was tasked to govern the province of Khorasan by his brother Muhammad I.Grousset, René (1970) ''The Empire of the Steppes'' Rutgers University Press, New Brunswick, New Jersey, USA
p. 159
Over the next several years, Ahmad Sanjar became the ruler of most of Iran (Persia), and eventually in 1118, the sole ruler of the Great Seljuk Empire."SANJAR, Aḥmad b. Malekšāh"
''Encyclopædia Iranica''

In 1141, Ahmad marched to eliminate the threat posed by Kara Khitans and faced them in the vicinity of Samarkand at the Battle of Qatwan. He suffered his first defeat in his long career, and as a result lost all Seljuk territory east of the Syr Darya.

Sanjar's as well as the Seljuks' rule collapsed as a consequence of yet another unexpected defeat, this time at the hands of the Seljuks' own tribe, in 1153. Sanjar was captured during the battle and held in captivity until 1156. It brought chaos to the Empire - a situation later exploited by the victorious Turkmens, whose hordes would overrun Khorasan unopposed, wreaking colossal damage on the province and prestige of Sanjar. Sanjar eventually escaped from captivity in the fall of 1156, but soon died in Merv in 1157. After his death, Turkic rulers, Turkmen tribal forces, and other secondary powers competed for Khorasan, and after a long period of confrontations, the province was finally conquered by Khwarazmians in the early 1200s.

The Tomb of Ahmed Sanjar was destroyed by the Mongols led by Tolui, who sacked the city of Merv in 1221, killing 700,000 people according to contemporary sources during their catastrophic invasion of Khwarazm; however, modern scholarship holds such figures to be exaggerated.

Division of empire

When Malikshāh I died in 1092, the empire split as his brother and four sons quarrelled over the apportioning of the empire among themselves. Malikshāh I was succeeded in Anatolia by Kilij Arslan I, who founded the Sultanate of Rum, and in Syria by his brother Tutush I. In Persia he was succeeded by his son Mahmud I, whose reign was contested by his other three brothers Barkiyaruq in Iraq, Muhammad I in Baghdad, and Ahmad Sanjar. When Tutush I died, his sons Radwan and Duqaq inherited Aleppo and Damascus respectively and contested with each other as well, further dividing Syria amongst emirs antagonistic towards each other.

In 1118, the third son Ahmad Sanjar proclaimed himself Sultan and established a capital in Baghdad, until 1131 when he was finally officially deposed by Ahmad Sanjar.

Elsewhere in nominal Seljuk territory were the Artuqids in northeastern Syria and northern Mesopotamia; they controlled Jerusalem until 1098. The Dānišmand dynasty founded a state in eastern Anatolia and northern Syria and contested land with the Sultanate of Rum, and Kerbogha exercised independence as the atabeg of Mosul.

First Crusade (1095–1099)

During the First Crusade, the fractured states of the Seljuks were generally more concerned with consolidating their own territories and gaining control of their neighbours than with cooperating against the crusaders. The Seljuks easily defeated the People's Crusade arriving in 1096, but they could not stop the progress of the army of the subsequent Princes' Crusade, which took important cities such as Nicaea (İznik), Iconium (Konya), Caesarea Mazaca (Kayseri), and Antioch (Antakya) on its march to Jerusalem ( Al-Quds). In 1099 the crusaders finally captured the Holy Land and set up the first Crusader states. The Seljuks had already lost Palestine to the Fatimids, who had recaptured it just before its capture by the crusaders.

After pillaging the County of Edessa, Seljukid commander Ilghazi made peace with the Crusaders. In 1121 he went north towards Georgia and with supposedly up to 250 000 – 350 000 troops, including men led by his son-in-law Sadaqah and Sultan Malik of Ganja, he invaded the Kingdom of Georgia. David IV of Georgia gathered 40,000 Georgian warriors, including 5,000 monaspa guards, 15,000 Kipchaks, 300 Alans and 100 French Crusaders to fight against Ilghazi's vast army. At the Battle of Didgori on August 12, 1121, the Seljuks were routed, being run down by pursuing Georgian cavalry for several days afterward. The battle helped the Crusader states, which had been under pressure from Ilghazi's armies. The weakening of the main enemy of the Latin principalities also benefitted the Kingdom of Jerusalem under King Baldwin II.

Second Crusade (1147–1149)

During this time conflict with the Crusader states was also intermittent, and after the First Crusade increasingly independent atabegs would frequently ally with the Crusader states against other atabegs as they vied with each other for territory. At Mosul, Zengi succeeded Kerbogha as atabeg and successfully began the process of consolidating the atabegs of Syria. In 1144 Zengi captured Edessa, as the County of Edessa had allied itself with the Artuqids against him. This event triggered the launch of the Second Crusade. Nur ad-Din, one of Zengi's sons who succeeded him as atabeg of Aleppo, created an alliance in the region to oppose the Second Crusade, which landed in 1147.

Decline

Ahmad Sanjars in Transoxiana, Ghurids in Afghanistan and Qarluks in modern Kyrghyzstan, as well as the nomadic invasion of the Kara-Khitais in the east. The advancing Kara-Khitais first defeated the Eastern Kara-Khanids, then followed up by crushing the Western Kara-Khanids, who were vassals of the Seljuks at Khujand. The Kara-Khanids turned to their Seljuk overlords for assistance, to which Sanjar responded by personally leading an army against the Kara-Khitai. However, Sanjar's army was decisively defeated by the host of Yelu Dashi at the Battle of Qatwan on September 9, 1141. While Sanjar managed to escape with his life, many of his close kin including his wife were taken captive in the battle's aftermath. As a result of Sanjar's failure to deal with the encroaching threat from the east, the Seljuk Empire lost all its eastern provinces up to the river Syr Darya, and vassalage of the Western Kara-Khanids was usurped by the Kara-Khitai, otherwise known as the Western Liao in Chinese historiography.

Conquest by Khwarezm and the Ayyubids

In 1153, the Ghuzz (Oghuz Turks) rebelled and captured Sanjar. He managed to escape after three years but died a year later. The atabegs, such as the Zengids and Artuqids, were only nominally under the Seljuk Sultan, and generally controlled Syria independently. When Ahmad Sanjar