Italy. The war in the Pacific lasted until the US dropped atomic bombs on Hiroshima and Nagasaki leading to Japan's unconditional surrender (a term FDR insisted on earlier in the war). The atomic bomb took &gt;$2B and &gt;3 years to build and was top secret. The Japanese internment was based on completely fabricated information by General John Dewitt, even the Justice Department eventually dismissed his information, but of course, that was after the internment camps had already been up and running thanks to the War Relocation Authority signed by FDR. 7. It took a long time for the US to enter the war as for years most of the country believed in isolation. Then the US had to spend time building up an incredible inventory of fighting equipment. Time and resources were on the US's side. Britain and the Russians fought off the Germans while the US supplied materials and artillery. It was not until D-Day 6/6/44 that the US finally landed ground troops in Europe, despite promising Stalin for almost two years they would enter. The allied forces had too much firepower for Germany, thanks to the US. Hitler killed himself in April 1945, after Germany had been almost completely defeated. 8. The war mobilization effort both got the US out of the depression and won the war. This effort worked with big business and took over factories, and produced copious amounts of ships, airplanes, artillery, etc.. While there may have been someone named Rosie who did in fact