|Part of Great War|
The British Sixth Army fighting in the outskirts of Kut.
|United Kingdom:|| Ottoman Empire |
Emirate of Ha'il
|Commanders and leaders|
| T.E Lawrence |
| Enver Pasha |
|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.