The regiment's name was again changed to the Prince Albert's (Somerset Light Infantry) in 1912.The Regiment saw active service in the First World War, with battalions involved on the Western Front, Mesopotamia (now Iraq) and Palestine. Altogether, 18 battalions existed during the war. One of the new battalions was formed by the conversion of the West Somerset Yeomanry, a Territorial Force Cavalry Regiment; the rest were formed by the duplication of the existing Territorial Force units or by the formation of new "service" battalions.