King Rat (1965)
It is set in Changi Jail Singapore, in 1945
The Japanese did not have to guard Changi as a normal prison of war camp. The inmates of Changi had no friendly Swiss border or any other neutral country within reach. They were held captive not so much by high walls, or barbed wire, or machine-gun posts, but by the land and sea around them - and the jungle was not neutral, nor was the ocean.
They did not live in Changi. They existed. This is the story of that existence.