The New Guinea Advanced Base was formed in Port Moresby in August 1942, and sub bases were created at Milne Bay and Oro Bay. These became Advanced Sub Base A and Advanced Sub Base B respectively in April 1943. Advanced Sub Base C was created on Goodenough Island in April 1943, but was discontinued when the island was handed over to Sixth Army control in July. Meanwhile, Advanced Sub Base D was formed at Port Moresby in May. The sub bases became bases in August 1943. Advanced Base E was formed at Lae and Advanced Base F at Finschhafen in November 1943, followed by Bases G and H at Hollandia and Biak respectively.