You will be given a definition of a task first, then some input of the task.
Generate a correct and concise answer for the question based on the words in the context.

Context : General Sir John Garvock GCB (died 10 November 1878) was a British Army General who achieved high office in the 1860s.
Question : Which armed forces utilised the service of John Garvock?
Output:
British Army