The 15th Bombardment Squadron, arrived on 15 September 1942 from RAF Molesworth, flying the British Boston III light bomber. The 15th was originally part of the 27th Bombardment Group (Light), based in the Philippine Islands, however the group's planes (A-24's), did not arrive by 7 December 1941. Due to the deteriorating situation in the Philippines after the Japanese attack, they were diverted to Australia where they reformed into a combat unit and fought in the Dutch East Indies and New Guinea Campaigns.