Oldies. Black and white movie
A group of American soldiers on a German camp trying to escape. They needed a plan to get those on watching tower to kill first. One of the American soldiers were from the Native Americans (Red Indian). He made bows and arrows cutting them from their wooden beds. The bows was the best idea as a silent weapon to get those German watchers on the tower.

Please, if you know the title of this movie let me know.