The brigade was attached to the 6th (Poona) Division in September 1915. It took part in the Battle of Kut al Amara (28 September), the Battle of Ctesiphon (22–24 November) and the Affair of Umm at Tubul (1 December). After the Battle of Ctesiphon it was decided to withdraw the division to Kut where it was besieged. With the fall of Kut in April 1916, the brigade passed into Turkish captivity.