Subsequent to the reforms brought about in the Indian Army by Lord Kitchener in 1903, the regiment's designation was changed to 58th Vaughan's Rifles (Frontier Force). In 1914, the regiment's class composition was three companies each of Pathans and Sikhs, and one company each of Dogras and Punjabi Muslims. During the First World War, the regiment served on the Western Front in 1914–15, fighting in the Battles of Givenchy-les-la-Bassee, Neuve Chapelle, Aubers Ridge and Loos. In 1915, it served in Egypt moving to Palestine in 1917, where it fought in the Third Battle of Gaza, the Battle of Nebi Samwil and the Capture of Jerusalem. In 1918, it fought in the Battle of Megiddo, which led to the annihilation of Turkish Army in Palestine.