- Stalin wanted Germany to be ruined by reparations, and he wanted a buffer of friendly states round Russia to prevent a repeat of the Nazi invasion of 1941. Britain and America wanted a democratic and capitalist Germany as a world trading partner, strong enough to stop the spread of Communism westwards.is impossible to identify a time when the Cold War broke out . After 1945, a series of clashes and misunderstandings meant that the ideological differences widened more and more into open hostility.did the USA and USSR become rivalsand Potsdamat the Yalta Conference of February 1945 there were signs of conflict. The war was still going on, but it was clear that Hitler was going to be defeated, so the allies met to decide how they would organise Europe after the war. It was easy to agree to bring Nazi war-criminals to trial, admit Russia into the United Nations, and divide Germany into four zones , occupied by Britain, France, the USA and the USSR. But there was tension about two things: firstly, the kind of governments that would be set up in eastern Europe, particularly Poland (in the end the allies published a Declaration of Liberated Europe agreeing to set up democratic and self-governing countries and to the holding of free elections as soon as possible ; the fact that democracy and free elections meant different things to the two sides was passed over). The second source of conflict - reparations - was postponed by agreeing to set up a commission to look into the matter.the three met at Potsdam (July 1945), Hitler had been defeated. Also Roosevelt (who had liked Stalin) had died and been replaced as US President by Truman, who was aggressively anti-Communist, and who had the atomic bomb (when Russia did not). Most of all, Stalin had recently ordered the non-communist leaders in Poland arrested. So at Potsdam, the tensions below the surface at Yalta - about eastern Europe and reparations - came out into open disagreement. The Protocols agreed at Potsdam merely repeated the agreements at Yalta, except that Russia was allowed to take reparations from the Soviet Zone, and also 10% of the industrial equipment of the western zones as reparations.and Potsdamtactics and the Fulton Speechthe war, Stalin had trained eastern European Communists in Russia, and after Potsdam they returned to their own countries and began to take over. They took part in elections, and became government ministers, but then packed the army and police with communists, got non-communists discredited and arrested, and so took total control bit by bit - as Rakosi said in Hungary,