The Pacific Theater of Operations, or Pacific Theater, was the area of operations of U.S. forces during World War II in the Pacific War during 1941-45. From mid-1942 until the end of the war in 1945, there were two U.S. operational commands in the Pacific. The Pacific Ocean Areas, divided into Central Pacific Area, North Pacific Area and South Pacific Area), was commanded by Admiral Chester Nimitz, Commander-in-Chief Pacific Ocean Areas.