 In 1861 the unit was constituted as a Light Infantry regiment, and in 1889 it was renamed 'The 25th Regiment (3rd Battalion Rifle Regiment) of Bombay Infantry', then in 1901 'The 25th Bombay Rifles'.After the Mutiny, the regiment went on to serve in Hyderabad, Poona, Aurangabad, Mhow, Indore and Dhar, remaining part of the army of the Bombay Presidency until a reorganization of the Indian Army by Lord Kitchener in 1903 (the Kitchener Reforms) gave it the new name; '125th Napier's Rifles'.During the First World War, the regiment fought in both the European and Middle Eastern theatres of the war, from France to Mesopotamia, and participated as part of the Egyptian Expeditionary Force in General Allenby's march to take Jerusalem, getting the better of German and Ottoman opponents.