Task: Question Understanding
Input (English): Context : Colonel Reginald Edward Harry Dyer CB (9 October 1864 -- 23 July 1927) was an officer of the British Army who, as a temporary brigadier general, was responsible for the Jallianwala Bagh massacre in Amritsar (in the province of Punjab). 
Question : Which armed forces utilised the service of Reginald Edward Harry Dyer?
Output (English): military branch