The Battle of Bairoko was a battle between American and Imperial Japanese Army and Navy forces on 20 July 1943 during the New Georgia Campaign in the Solomon Islands during the Pacific War. In the battle, U.S. Marine Raiders—supported by two U.S. Army infantry battalions—attacked a Japanese garrison guarding the port of Bairoko on the Dragons Peninsula on New Georgia. The day-long assault on well-prepared Japanese defensive positions by the Americans was unsuccessful.