Four Japanese cruisers and six destroyers sortied out of Rabaul, New Britain to attack the US Marine invasion of Bougainville in the Solomon Islands. 75 B-25 bombers escorted by 80 P-38 fighters attacked this fleet just out of Rabaul, damaging cruiser Hajuro, damaging cruiser Myoko, sinking one submarine chaser, destroying 18 aircraft, damaging destroyer Shirasuyu, and damaging a number of smaller vessels; the Americans lost 8 B-25 and 9 P-38 aircraft in combat, plus more to be written off due to battle damage. The Japanese fleet, sailing at a reduced speed, engaged American warships at 0230 hours in Empress Augusta Bay. The Americans struck first, scattering the Japanese formation, but the Japanese were able to regroup and forced the American ships to withdraw. Though the action was inconclusive, the Japanese failed to disrupt American operations on Bougainville
