アッツ島沖海戦
Once more in the Aleutians, "Monaghan" joined TG 16.69 a scouting force built around cruisers and . On 26 March this group engaged the Japanese in the Battle of the Komandorski Islands. Although outnumbered, the Americans fired guns and torpedoes so effectively that the Japanese were driven away. Patrol and occasional shore bombardment missions throughout the Aleutians, along with escort missions, continued through the summer. Highlights were a radar-directed surface engagement with an unidentified target 20 June, and a chase of a Japanese submarine two days later that resulted with the submarine being driven up on rocks and abandoned. She was later identified as , engaged in evacuating troops from Kiska.