Murphy's War (1971)

Murphy, the last survivor of his crew after a brutal attack by a German U-Boat in the final days of World War II, finds refuge at a neglected mission station near the Orinoco River. Consumed by a desire for revenge, he hatches a daring plan to destroy the U-Boat responsible for his comrades' deaths. With the help of Louis, the local oil company administrator, Murphy embarks on a perilous journey, employing every resource at his disposal to confront his formidable enemy and seek justice for his fallen friends.