Conversation so far:
What is the far east and Miles Dempsey about?
Miles Dempsey was appointed to the command of the British Fourteenth Army and GOC in C Malaya Command and Land Force Commander.
Did anything significant happen to Miles Dempsey during his arrival in the far east?
By the time Miles Dempsey had arrived however, the war in the East was also over.

Question: What did he do in the military?
Self-contained rewrite: What did Miles Dempsey do in the military?