In 1914, during World War I the regiment was at first in the 4th (Quetta) Division which remained in India, on internal security and as a training unit. A second battalion was formed and both were posted overseas and served in the 12th Indian Division which fought in the Battle of Shaiba, the Battle of Khafajiya and the Battle of Nasiriya in the Mesopotamia Campaign. Two platoons were also posted to Tabriz, Iran as part of the Norperforce. The second battalion was also involved in the Mesopotamia campaign with the 14th Indian Division and fought in the Second Battle of Kut and the Fall of Baghdad (1917). Both battalions then served in the Third Afghan War.