During the First World War the regiment served in Egypt and then in Mesopotamia, where it fought the Battles of Shaiba, Ctesiphon and the Siege of Kut al Amara in 1915, where it was captured by the Turks. The 24th Punjabis returned to Mesopotamia in April 1917, after reforming, and fought in the Battle of Khan Baghdadi. They later served in Salonika and the Russian Transcaucasia.