American aircraft attacking successfully Japanese naval force at Rabaul, New Britain according to the U.S. Joint Intelligence Committee. Daily summary dated 22 March 1942

An item reported that 4 bombers of the US Amy attacked a Japanese naval force at Rabaul, New Britain [Papua New Guinea] consisting of 2 cruisers, 4 destroyers and 8 transports. One cruiser was hit and probably sunk, the second one was possible heavily damaged. There was none enemy resistance during the attack.

Source

Map Room Papers (Roosevelt Administration), 1942 - 1945. U.S. Joint Intelligence Committee. Daily summary No. 102 dated 22 March 1942