Operation Cartwheel
Instead of capturing Rabaul during their advance towards the Japanese Home islands, the Allied forces decided to bypass it by establishing a ring of airfields and naval bases on the islands around it. Cut off from re-supply and under continual air attacks as part of Operation Cartwheel, the base became useless. The Pacification of Rabaul took until the end of the war and was only completed following the Japanese surrender in August 1945.