poker tables and chairs

I have to have 5 yes or no questions to try to answer this riddle?

This scenario occurs between 1940 and 1945. Five men sit in chairs slumped forward at a table; a sixth chair is vacant. In front of each chair is a face-up poker hand. All five men are dead. In the background, the lights flicker and dim. How did these men die? Who is responsible for their deaths.

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My guess is that it is in a submarine, 6 crew members, only one spare air tank to get a person to the surface, they played cards to see who lived, the rest died of a lack of air, and the lights died as the batteries ran down.