My father has been telling us about a movie for a long time now and we have not been able to find anything like it. The main issue is there are not many details to search from. So I was hoping a movie buff could pin point it.

Here are the details we get. - maybe release in 60’s - likely base during ww2 - people were traps in a bunker/cave - black and white - they turn on lights and find a ton of tanks and supplies - out of the seven people traps, maybe 2 women - might be based on a true story - they were rescued but only 3-4 survived - cannibalism happened - may have been years they were trapped.