 The 19th BG received some replacement aircraft and was joined by the 43d Bomb Group in Australia in March.The two units took part in the campaign on Papua New Guinea, before the 19th BG was moved back to the United States at the end of 1942, transferring its assets to the 43d.The 43d BG flew combat missions with B-17s until August 1943, when they were replaced by B-24s.