It was geographically the largest theater of the war, including the vast Pacific Ocean theater, the South West Pacific theater, the Second Sino-Japanese War, and the Soviet–Japanese War. The Pacific War, sometimes called the Asia–Pacific War, was the theater of World War II that was fought in eastern Asia, the Pacific Ocean, the Indian Ocean, and Oceania. The UN Security Council ended the vast trusteeship in stages, from 1986 to 1994, with the US gaining the territory of the Northern Mariana Islands. The Trust Territory of the Pacific Islands is created by the United Nations and placed under the authority of the United States.Seizure and annexation of South Sakhalin and the Kuril Islands by the Soviet Union.Cession of Japanese-held islands in the Central Pacific Ocean to the United Nations.Liberation of Korea and Manchuria from Japanese rule, followed by the division of Korea.Removal of Japanese troops occupying parts of China and the retrocession of Taiwan to China.
Substantial weakening of European colonial powers and the gradual decolonization of Asia.