 That same month he was created a Companion of the Distinguished Service Order (DSO).Following the end of the war in June 1902, Trotter received a regular commission as a captain in his regiment in July 1902, and returned to the United Kingdom on board the SS "Lake Michigan" with a large contingent of men from the guards regiments in October 1902.Trotter was made Member of the Royal Victorian Order (MVO) in 1906, was promoted to major on 8 August 1907 and retired from the regular army on 27 July 1912, joining the Reserve of Officers of the Grenadier Guards.