Detailed Instructions: Generate a question which can yield the answer mentioned in the input. Generated question must be answered by the answer provided in input, without using any extra knowledge.
Q: 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).
Answer : British Army
A:
Which armed forces utilised the service of Reginald Edward Harry Dyer?