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| Occupation of Iraq (1914–1918) | |
|---|---|
| Conflict | Occupation of Iraq (1914–1918) |
| Partof | Middle Eastern theatre of World War I |
| Date | 1914–1918 |
| Place | Mesopotamia, Basra Vilayet, Baghdad Vilayet |
| Combatant1 | United Kingdom; British Indian Army; Indian Army |
| Combatant2 | Ottoman Empire; Iraqi tribal confederations; Kurdish tribes |
| Commander1 | John Nixon; Charles Townshend; Frederick Maude; Herbert Kitchener |
| Commander2 | Djemal Pasha; Enver Pasha; Mustafa Kemal Atatürk; Said Pasha |
| Strength1 | British and Indian expeditionary forces |
| Strength2 | Ottoman Sixth Army; local garrisons |
| Casualties1 | British and Indian casualties |
| Casualties2 | Ottoman casualties and civilian losses |
Occupation of Iraq (1914–1918)
The Occupation of Iraq (1914–1918) was the military conquest and subsequent control of Ottoman Mesopotamia by United Kingdom and British Indian Army forces during the Middle Eastern theatre of World War I. The campaign combined operations from Basra to Baghdad and involved key figures such as John Nixon (British general), Charles Townshend, and Frederick Maude, with political consequences reaching Paris Peace Conference (1919) and the Treaty of Sèvres.
The invasion stemmed from strategic imperatives connected to World War I, including protection of Persian Gulf oil facilities like Anglo-Persian Oil Company installations and securing communications to India. The Ottoman alignment with the Central Powers under Enver Pasha and Djemal Pasha threatened Suez Canal and Basra Vilayet, prompting policy from Winston Churchill and directives from British Cabinet actors such as David Lloyd George and Herbert Kitchener. Prewar interests of Royal Navy, Indian Army, and commercial entities like the East India Company legacy shaped planning that referenced earlier expeditions such as the Anglo-Iraqi Treaty precursors and the memory of the Napoleonic invasion of Egypt.
Initial operations centered on the Battle of Basra (1914) where General Sir Arthur Barrett and divisions of the British Indian Army secured Basra against Ottoman Empire forces. Advances led to the Siege of Kut and the surrender of Charles Townshend after the Fall of Kut (1916), provoking relief attempts including the Battle of Ctesiphon and actions by commanders like Brigadier-General Aylmer. Renewed offensives under Frederick Maude culminated in the Capture of Baghdad (1917) and later the Fall of Mosul operations, intersecting with engagements against the Ottoman Sixth Army and confrontations influenced by Lawrence of Arabia-era insurgencies in neighbouring Hejaz. Naval elements from the Royal Navy and riverine flotillas on the Tigris and Euphrates supported logistics, while rail and telegraph lines linked to Baghdad Railway considerations. Campaigns involved coordination with Indian Expeditionary Force D and units such as the 27th Indian Brigade.
Military governance after Capture of Baghdad (1917) was overseen by staff officers and civil administrators drawn from India Office and War Office, implementing emergency law, censuses, and public works modeled on precedents like the British Mandate for Palestine framework. Administrators negotiated with local notables including Sheikh Mahmud Barzanji in Kurdistan and urban elites in Baghdad and Basra, while imposing taxation and land registration influenced by Ottoman codes and British Indian administrative practice. Health interventions referenced Florence Nightingale-era reforms and responses to epidemics such as 1918 influenza pandemic. Judicial measures combined preserved Sharia courts and new tribunals, and infrastructure efforts involved river dredging and telegraph repair supported by units drawn from the Royal Engineers.
Occupation disrupted irrigation systems of the Mesopotamian Marshes and the agrarian cycles along the Tigris and Euphrates, affecting cultivators and merchant networks in Mosul, Kirkuk, and Nasiriyah. Trade routes tied to Baghdad souks and caravan routes to Persia suffered from requisitioning and economic blockade, while demand for oil from fields near Kirkuk accelerated exploration by Anglo-Persian Oil Company and allied firms. Demographic shifts included refugee flows toward Basra and urban displacement in Baghdad Vilayet, and social tensions involved elites such as the Odjak of Janissaries-era descendants and minority communities including Assyrians, Armenians, and Chaldeans.
Local resistance ranged from organized Ottoman garrisons to tribal uprisings led by figures like Shaikh Khazal and Kurdish notables including Sheikh Mahmud Barzanji, who staged revolts against occupation authorities. The 1916 nationalist currents resonated with Arab leaders connected to the Arab Revolt and to activists within groups influenced by the Young Turks movement, while religious leaders in Najaf and Karbala mobilized clergy networks. Episodes such as the Siege of Kut prompted popular reactions across Mesopotamia, and collaboration with British forces included recruitment of Assyrian Levies and use of allied irregulars.
Occupation fed into postwar negotiations at the Paris Peace Conference (1919) and informed the drafting of mandates under the League of Nations, particularly the British Mandate for Mesopotamia concept later formalized through the Treaty of Sèvres and challenged by the Turkish War of Independence. Anglo-Ottoman arrangements intersected with interests of France, Russia, and Italy in the Sykes–Picot Agreement, and influenced disputes over Mosul Vilayet and oil concessions adjudicated in forums involving the Iraq Petroleum Company and diplomats including Gertrude Bell and Sir Percy Cox.
Following the armistice with the Ottoman Empire and the collapse of Central Powers, British forces transitioned from occupation to mandate-style trusteeship, culminating in political engineering that produced the Kingdom of Iraq under Faisal I of Iraq after the Iraq revolt of 1920 pressured policy changes by Sidney Reilly-era advisers and Crown Colony debates in the British Parliament. The legacy included contested borders enshrined at the Treaty of Lausanne, long-term Anglo-Iraqi Treaty arrangements, and strategic positioning for Royal Air Force basing and oil extraction that shaped interwar Middle Eastern geopolitics.
Category:Mesopotamian campaign Category:World War I occupations