Hitler's infamous U-shaped submarine battle was in the midst of a fierce battle when a U-shaped submarine ran into the U.S. Navy's swordfish on its way back. After a short fierce battle, the Germans captured a group of American officers and soldiers. The U-shaped submarine was found by US warships during the voyage. what kind of action will this group of US prisoners of war take on the enemy submarine? Is it to help Nazi submarines dodge a bullet to save their lives, or to burn their bridges and fight against the enemy?