America produced the early days of submarines, iron ships, turreted guns on ships, advanced radar the axis could not well compete with, sonar that became so well developed(fm) that allied submarines could weave through mine fields-the axis had nothing like it. America had a jet fighter before we even entered the war, and about and equal to the much bragged about Me-262. America became so good at mass producing ships, many were built in meredays, and yet were tough to sink. The British computer made defeating Germany and Japan evenmore inevitable. High quality American fighters near the end of the war doomed Axis pilots who reported they felt like they were strapping into a coffin when they entered their aircraft. American and Russian tanks way out numbered German tanks, and Japanese tanks we tin jokes, easily destroyed. The Russians made some fighter aircraft superior to German aircraft, and the Russians overwhelmed the German troops who many had bolt action rifles, the Russians armed their soldiers with high capacity machinguns. It was never a 'fair' fight,Yamamoto saw that before the war began with the usa. His 6 months to a year prophesy was quite accurate. Japanese aircrat carriers often sunk with in or two bomb hits, American carriers could survive two sinkings, but not three. TheJapanese kept trying to sink carriers they already reported as sunk. Americans built trucks and tanks that could swim and drive up onto beaches/land. Napalm, tree burst artillery rounds, and proximity rounds devastating to enemy aircraft. Mass production and a very large educated working workforce. Some even pointout; God was on our side. It was never a 'fair' fight. As for the poor victimized Japanese, Read up on the Rape of Nanking, severe and nasty massive atrocities, as the Japanese wanted to terrorize the Chinese.