77 B-24 bombers from Port Moresby, Australian Papua made rendezvous with 55 P-38 fighters over Kiriwina, Trobriand Islands for a raid on Rabaul, New Britain; a separate group of 54 B-25 bombers, modified for strafing, flew for Rabaul separately. Poor weather would force the first group to cancel its mission, but the B-25 bombers proceeded without fighter escort. They heavily damaged Japanese submarine chaser CH-23, lightly damaged transport Johore Maru, and shot down 8 Japanese fighters (3 additional fighters were lost on landings); the Japanese shot down many B-25 bombers. Subsequent investigation on why the B-25 bombers proceeded despite having no escorts would find no faults.
