Pretty cool WWII story, told mostly through flashbacks, about French convicts led by Humphrey Bogart who escape from Devil's Island to go help their country fight the Nazis. The men are picked up by a freighter bound for home and must deal with slimy Sydney Greenstreet, who isn't particularly opposed to the idea of a Nazi-occupied France.
Reunites Casablanca costars Bogart, Rains, Lorre, and Greenstreet with director Michael Curtiz. In many ways, this could be seen as a possible sequel to Casablanca, though certainly not in that film's league. I could see where you could rework the story to be about Rick, Ilsa, and Louis' post-Casablanca story. Cute use of models in early scene where the war correspondent arrives to speak with Claude Rains. This movie is slammed a lot for its use of the flashback-within-a-flashback-within-a-flashback technique. Normally I'm not a fan of that myself but here I didn't think it was confusing like critics claim. The ending is kind of depressing but realistic. War is hell, after all.