Under Strange Flags (1937)

It's 1914 in Mexico and Tom Kenyon is trying to safely transport a load of silver. General Barranca who is battling Panch Villa wants the silver. Villa's Captain is secretely working for Barranca and he convinces Villa that Tom is one of Barranca'a men and should be shot. The pleading of Tom's mother helps Tom and Villa become friends and he is released. But when Tom returns Villa is not there and the Captain orders his immediate execution.