It took part in the Mesopotamian campaign and was disbanded shortly after the end of the war.

[1] While with the division, it took part in the attempts to relieve the 6th (Poona) Division besieged in Kut, including the Attack on the Dujaila Redoubt (8 March) and the action of Bait Isa (17 – 18 April).

[2] In May 1916, the brigade joined the newly formed 14th Indian Division.

It remained with the division for the rest of the war and took part in a large number of small actions: the Advance to the Hai and Capture of the Khudaira Bend (14 December 1916 – 19 January 1917), the Capture of the Hai Salient (25 January – 5 February 1917), the Capture of the Dahra Bend (9 – 16 February), the Capture of Sannaiyat (17 – 24 February), the Passage of the Tigris (23 – 24 February), the Second Action of Jabal Hamrin (16 – 20 October), and the Third Action of Jabal Hamrin (3 – 6 December 1917).

[3] At the end of the war, the 14th Division was rapidly demobilized and the 37th Indian Brigade was broken up in February 1919.