
The
Iraq
Iraq,; ku, عێراق, translit=Êraq officially the Republic of Iraq, '; ku, کۆماری عێراق, translit=Komarî Êraq is a country in Western Asia. It is bordered by Turkey to Iraq–Turkey border, the north, Iran to Iran–Iraq ...
–
Turkey
Turkey ( tr, Türkiye ), officially the Republic of Türkiye ( tr, Türkiye Cumhuriyeti, links=no ), is a list of transcontinental countries, transcontinental country located mainly on the Anatolia, Anatolian Peninsula in Western Asia, with ...
border ( ku, Sînorê raqê–Tirkiye, ar, الحدود العراقية التركية, translit=
alhudud aleiraqiat alturkia, tr, Irak–Türkiye sınırı) is 367 km (228 mi) in length and runs from the
tripoint
A tripoint, trijunction, triple point, or tri-border area is a geographical point at which the boundaries of three countries or subnational entities meet. There are 175 international tripoints as of 2020. Nearly half are situated in rivers, l ...
with
Syria in the west to the tripoint with
Iran
Iran, officially the Islamic Republic of Iran, and also called Persia, is a country located in Western Asia. It is bordered by Iraq and Turkey to the west, by Azerbaijan and Armenia to the northwest, by the Caspian Sea and Turkm ...
in the east.
Description
The border starts in the west at the tripoint with Syria at the confluence of
Tigris river and
Little Khabur river. It then follows the latter river eastwards, and then the
Hezil Suyu river to the north-east. The border then turns eastwards overland via series of irregular lines over mountain crests and small streams, eventually turning southwards to connect to the Hajji Bak (Hacibey Suyu) river. It then follows this river north-eastwards to the Iranian tripoint. The border region is extremely mountainous and is populated almost exclusively by
Kurds ug:كۇردلار
Kurds ( ku, کورد ,Kurd, italic=yes, rtl=yes) or Kurdish people are an Iranian peoples, Iranian ethnic group native to the mountainous region of Kurdistan in Western Asia, which spans southeastern Turkey, northwestern Ir ...
on both sides.
History
At the start of the 20th century the
Ottoman Empire
The Ottoman Empire, * ; is an archaic version. The definite article forms and were synonymous * and el, Оθωμανική Αυτοκρατορία, Othōmanikē Avtokratoria, label=none * info page on book at Martin Luther University) ...
controlled what is now Turkey and Iraq.
During the
First World War
World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, the United States, and the Ottoman Empire, with fig ...
an
Arab Revolt
The Arab Revolt ( ar, الثورة العربية, ) or the Great Arab Revolt ( ar, الثورة العربية الكبرى, ) was a military uprising of Arab forces against the Ottoman Empire in the Middle Eastern theatre of World War I. On ...
, supported by Britain, succeeded in removing the Ottomans from most of the Middle East. As a result of the secret 1916 Anglo-French
Sykes–Picot Agreement Britain gained control of the Ottoman Vilayets of
Mosul
Mosul ( ar, الموصل, al-Mawṣil, ku, مووسڵ, translit=Mûsil, Turkish: ''Musul'', syr, ܡܘܨܠ, Māwṣil) is a major city in northern Iraq, serving as the capital of Nineveh Governorate. The city is considered the second large ...
,
Baghdad
Baghdad (; ar, بَغْدَاد , ) is the capital of Iraq and the second-largest city in the Arab world after Cairo. It is located on the Tigris near the ruins of the ancient city of Babylon and the Sassanid Persian capital of Ctesipho ...
and
Basra
Basra ( ar, ٱلْبَصْرَة, al-Baṣrah) is an Iraqi city located on the Shatt al-Arab. It had an estimated population of 1.4 million in 2018. Basra is also Iraq's main port, although it does not have deep water access, which is han ...
, which it organised into the
mandate of Iraq
The Mandate for Mesopotamia ( ar, الانتداب البريطاني على العراق) was a proposed League of Nations mandate to cover Ottoman Iraq (Mesopotamia). It would have been entrusted to the United Kingdom but was superseded by the ...
in 1920.

By the 1920
Treaty of Sèvres Anatolian Turkey was to be partitioned, with the areas north of the Mosul Vilayet to be included within an autonomous or independent Kurdish state.
Turkish nationalists were outraged at the treaty, contributing to the outbreak the
Turkish War of Independence; the Turkish success in this conflict rendered Sèvres obsolete.
By the 1923
Treaty of Lausanne
The Treaty of Lausanne (french: Traité de Lausanne) was a peace treaty negotiated during the Lausanne Conference of 1922–23 and signed in the Palais de Rumine, Lausanne, Switzerland, on 24 July 1923. The treaty officially settled the conf ...
Turkey's independence was recognised and a far more generous territorial settlement was agreed upon, albeit at the cost of Turkey formally renouncing any claim to Arab lands.
As a provisional measure, the former northern border the Mosul Vilayet was to serve as a frontier between British-controlled Iraq and Turkey, with a more precise delimitation to be agreed upon later.
British and Turkish officials met in 1924 but were
unable to determine a mutually satisfactory border, and the matter was referred to the
League of Nations
The League of Nations (french: link=no, Société des Nations ) was the first worldwide Intergovernmental organization, intergovernmental organisation whose principal mission was to maintain world peace. It was founded on 10 January 1920 by ...
.
In October 1925 the League proposed a border (the ‘Brussels line’) that was essentially the same as that of the northern limits of the old Mosul Vilayet.
[The Geography of the Mosul Boundary: Discussion "The Geographical Journal" 1926] After further deliberations, the League formally recommend in July 1925 that the Brussels line be utilised, a view endorsed by the
Permanent Court of International Justice at the Hague in November 1925.
On 5 June 1926 Britain and Turkey signed the
Treaty of Ankara Treaty of Ankara may refer to:
*Treaty of Ankara (1921)
*Treaty of Ankara (1926)
The Treaty of Ankara (1926), also known as The Frontier Treaty of 1926 ( tr, Ankara Anlaşması), was signed 5 June 1926 in Ankara by Turkey, United Kingdom and M ...
, by which both states recognised the Brussels line (with some minor modifications) as the frontier.
The border was then demarcated on the ground in 1927.
Generally cordial, relations between Iraq and Turkey became strained following the
Gulf War
The Gulf War was a 1990–1991 armed campaign waged by a Coalition of the Gulf War, 35-country military coalition in response to the Iraqi invasion of Kuwait. Spearheaded by the United States, the coalition's efforts against Ba'athist Iraq, ...
(1990–91); this resulted in an autonomous Kurdish area being established in
northern Iraq which provided sanctuary for Kurdish guerrillas
operating in the south-east Turkey. Since then Turkey has conducted numerous military incursions across the border in a bid to counter what it sees as Kurdish terrorism.
Crossings
There are three crossings along the entire border, two for vehicular traffic and one for vehicular and rail traffic. The busiest of three,
Habur, is among the busiest border checkpoints in the world.
Border Crossings

The main crossing is the
Ibrahim Khalil border crossing.
[(2015) ''Bradt Guide Book to Iraq: The ancient sites and Iraqi Kurdistan'', pgs. 368]
See also
*
Iraq–Turkey relations
References
{{DEFAULTSORT:Iraq-Turkey border
Borders of Iraq
Borders of Turkey
International borders
Iraq–Turkey relations