After what event and when did the Cold War era begin?

In 1946, British Prime Minister W. Churchill delivered a speech in Fulton in which he used the concept of the “Iron Curtain” to characterize the political division of Europe, and called for the creation of an alliance of Anglo-Saxon states against the threat posed by the USSR. He called on all capitalist countries to fight communism. Churchill’s speech was considered the beginning of the Cold War, which was an ideological, political and military conflict between the capitalist bloc and the United States and the socialist bloc led by the Soviet Union. This war lasted from the moment of the collapse of the anti-Hitler coalition after the victory over Germany until the liquidation of the socialist system in the USSR in the late eighties and early nineties.