Forming the southern of the Bismarck Sea and the Bismarck Archipelago, the island of New Britain was focused for seizure by General MacArthur as it would mean control of the Vitiaz and Dampier Straits. Planning began and decision was made to first seize Arawe Peninsula, an island, a town, a plantation and the Japanese occupation forces situated on the southern coast, sixty miles south across island from Cape Gloucester. Cape Gloucester was tasked for seizure by Major General William H. Rupertus, the landing force commander of the northern elements.