Shock

Captain Bob Hayworth, his brother Lieutenant Gilroy Hayworth and Captain Derek Marbury are in a World-War 1 trench on the front-lines in France. Bob Hayworth resents Marbury greatly as the latter had married the girl, Lucy Neville, Marbury was courting in pre-war London. Ordered to go on a night patrol, the cowardly Gilroy committed suicide rather than face his fear. (imdb)