During her Fifth War Patrol, USS Harder (SS 257) sinks Japanese destroyer Tanikaze in the Sibitu Passage, about 90 miles southwest of Basilan Island. On June 6, she sinks the Japanese destroyer Minazuki 120 miles east-northeast of Tarakan, Borneo. On June 7, Harder sinks the Japanese destroyer Hayanami south of the Japanese fleet anchorage at Tawi Tawi, southeast of the Sibitu Passage, Borneo. On the morning of Aug. 24, Harder is sunk in Dasol Bay, Philippines, by enemy depth charges on its Sixth War Patrol. There are no survivors and the crew is never recovered. For his "conspicuous gallantry and intrepidity " in sinking the Japanese destroyers during the Fifth War Patrol, Cmdr. Samuel D. Dealey, Harders CO, is posthumously awarded the Medal of Honor.