Mesopotamian Theatre
Part of Great War
Mesopotamian campaign 6th Army Siege of Kut
The British Sixth Army fighting in the outskirts of Kut.
Date January 7, 1917 – October 4, 1918
(1 year, 8 months, 3 weeks and 6 days)
Location Ottoman Levant
Result Allied victory, start of the Mesopotamian and Anatolian Fronts
Flag of the United Kingdom United Kingdom:

Flag of Russia Empire of All Russians Flag of the German Empire Germany
Flag of Assyria Assyrian Liberation Army

Flag of Persia (1910-1925) Qajar Dynasty
Flag of Jordan Arab Army

Flag of the Ottoman Empire Ottoman Empire
Flag of the Emirate of Ha'il Emirate of Ha'il 
Flag of Royalist France French State
Commanders and leaders
T.E Lawrence
Edmund Allenby
Agha Petros
Enver Pasha
Mustafa Kermal
Édouard Drumont
962,876 (with rebels) 771,231
Casualties and losses
245,130 killed, wounded, captured or missing 600,000 killed, wounded, captured or missing

The Mesopotamian Theatre followed the Levantine Theatre after British positions pursued Ottoman troops into Mesopotamia as they fled from British-occupied Syria. The Theatre continued the acting of the British army, aided by Assyrian and Arabic irregular armies; the Theatre also saw the entrance of the war for Qajar Iraq. As one of the final fronts in the Great War, the Mesopotamian Theatre experienced major political upheaval and the redrawing of the centuries-old borders of the Ottoman Empire in Mesopotamia.