Dee ihe na-aga n'ihu na paragraf a - United States rụrụ ọrụ dị mkpa na nzukọ Bretton Woods na Yalta, bụ ndị bịanyere aka na nkwekọrịta banyere ụlọ ọrụ ego mba ụwa ọhụrụ na nhazi nke Europe mgbe agha gasịrị. Ka ndị Allied meriri na Europe, otu nzukọ mba nile e nwere na San Francisco na 1945 wepụtara Charter nke United Nations, bụ́ nke malitere ịdị irè mgbe agha ahụ gasịrị. Mgbe ahụ, United States na Japan lụsoro ibe ha agha mmiri kasị ukwuu n'akụkọ ihe mere eme, Agha Leyte Gulf. United States mepụtara ngwá agha nuklia mbụ ma jiri ha lụso Japan ọgụ n'obodo Hiroshima na Nagasaki n'August 1945; ndị Japan chịliri aka elu
na September 2, na-akwụsị Agha Ụwa nke Abụọ.