In 1941, the Nazis conquered the USSR and then exterminated most of its Slavic peoples; the few whom they allowed to live were confined to reservations. In the Pacific, the Japanese destroyed the entire U.S. Navy fleet in a decisive, definitive attack on Pearl Harbor; thereafter, the superior Japanese military conquered Hawaii, Australia, New Zealand and Oceania during the early forties. Afterward, the Axis Powers, each attacking from opposite fronts, conquered the coastal United States, and, by 1947, the United States and other remaining Allied forces surrendered to the Axis.