 Early in 1916, the regiment arrived in Mesopotamia, where they were engaged in fierce fighting on the Tigris Front during British efforts to relieve the besieged garrison of Kut al Amara.The regiment took part in the Battles of Dujaila Redoubt, Beit Aissa, Khudaira Bend & Jebel Hamrin.It fought with great gallantry and suffered heavy losses in this long and bloody campaign.