The Operation Boatswain Memorial is a memorial dedicated to a group of 23 fighters who died at sea in 1941, during World War II. They fought for Palmach, a paramilitary group in Palestine. Operation Boatswain was a mission to damage oil refineries in Tripoli, Lebanon. The mission failed, and the bodies of the fighters were never found. In Hebrew, these men are known as "" ("the twenty-three who went down with the ship").