Operation Boatswain was the first of the operational missions carried out by the Palmach as part of the cooperation between the Jewish Yishuv in Mandatory Palestine and the British during World War II. The mission to sabotage oil refineries in Tripoli was unsuccessful, ending with the disappearance of 23 Palmach commandos and British SOE officer Major Sir Anthony Palmer after their boat was lost at sea on 18 May 1941.