 He was again in South Africa for the end of the war, and was invalided home in July 1902, when he left Cape Town on the SS "Canada", returning to Southampton.In 1914 Cameron (who was then commanding officer of the 3rd (Reserve) Battalion of the Queen's Own Cameron Highlanders) was asked by Field Marshal Herbert Kitchener, 1st Earl Kitchener to raise a battalion of infantry; Lochiel agreed, on condition that he would be its commanding officer; this became the 5th (Service) Battalion of the regiment, which saw distinguished service on the western front as part 9th (Scottish) Division.Lochiel was invalided home in 1916 but resumed command of the 3rd Battalion in January 1918, when it was in Ireland.