 As part of the 7th Division's 21st (Bareilly) Brigade, the regiment sailed from Marseilles to go to Mesopotamia, landing at Basra on 31 December 1915 and taking part in the attempt to relieve the besieged garrison of Kut al Amara.It proceeded under Allenby to Palestine, and arrived at Suez on 13 January 1918.The unit suffered some problems and criticism during the First World War.