Conversation so far:
What did dempsey study?
After the end of World War II in Europe, Dempsey was appointed to the command of the British Fourteenth Army and GOC in C Malaya Command.
Did he have to lead his command into battle?
By the time he had arrived however, the war in the East was also over.
Within his command were 123,000 British and Dutch prisoners and nearly 750,000 captured Japanese.
Did they release the prisoners since the war was over?
CANNOTANSWER.
What other notable events happened while he was in the far east?
Miles Dempsey, although modest and unassuming, was considered to be a highly competent officer.
He asserted a very effective control over the British Second Army.
Did he recieve any awards for this accomplishment?
Dempsey was considered the Eighth Army's best expert in combined operations and, as he grew in experience, Montgomery soon recognized his potential for army command.
Was he then promoted to command?
Dempsey was appointed to the command of the British Fourteenth Army.
How large was the fourteenth army?
Within his command were 123,000 British and Dutch prisoners and nearly 750,000 captured Japanese.

Question: What happened to the prisoners?
Self-contained rewrite: What happened to the prisoners during the war?