Other operations during this period included support for ground forces on New Guinea; attacks on airfields and installations in New Guinea, the Bismarck Archipelago, Celebes, Halmahera, Yap, Palau, and the southern Philippines; and long-range raids against oil refineries on Ceram and Borneo.
In September 2011, Eramet Sa announced that the company plans to invest $6 billion in a nickel mining project including hydrometallurgical plant and various supporting infrastructure in Halmahera Island, North Maluku, Indonesia.
It lies near the southern end of a chain of volcanic islands off the western coast of Halmaherato (Halmahera region), to the south of Tidore and to the north of Kayoa and Bacan.