Whakaotihia te rerenga e whai ake nei: I te mutunga o te pakanga, ka rere a Truman ki Berlin mo te Huihuinga o Potsdam, ki te whakatau ki te kaiarahi o Soviet Joseph Stalin me te kaiarahi o Ingarangi a Winston Churchill mo te raupapa o muri o te pakanga. He maha nga whakataunga nui i mahia i te Huihuinga o Potsdam: Ka wehea a Tiamana ki nga rohe mahi e wha (i waenga i nga mana e toru me France), ka neke te rohe o Tiamana ki te hauauru ki te raina Oder-Neisse, i mohiotia he roopu i tautokohia e te Soviet hei kawanatanga tika o Poland, a ka wehewehea a Vietnam i te 16th parallel. I whakaae hoki te Soviet Union ki te
whakarewahia he whakaekenga o Manchuria e puritia ana e te Hapanihi. I a ia i te Huihuinga o Potsdam, i whakamohio a Truman kua angitu te whakamatautau a Trinity mo te poma ngota tuatahi i te Hurae 16. I tohu a ia ki a Stalin e mea ana te U.S. ki te whakamahi i tētahi momo patu hou ki ngā Hapanihi. Ahakoa koinei te wa tuatahi i whakawhiwhia ai ki nga Soviet nga korero mo te poma ngota, kua mohio a Stalin ki te kaupapa o te poma, i te mea i mohio ia ki a ia na roto i nga mahi tutei i mua atu i a Truman.