The shift in outlook was not sudden or easy The rise of Hitler posed a threat to the balance of power in the new world and Nazis posed a threat to the U.S. The U.S. wasn’t justified to declare war on Germany after Pearl Harbor, but luckily they declared war on the U.S. first FDR did not believe the public would follow him into a full-out war with Japan and Germany, which is why he gave full support to Britain Most people believed the U.S. should go to war, especially after Pearl Harbor, whereas most people didn’t want war in WWI Another example of a change in isolationism is the fact that most people wanted to join a peacekeeping organization after WWII 5. Challenge and Response WWII did not give enough reason for the U.S. to assert its military power around the world It was the complete destruction of the German Nazis that brought military power to Europe The fear of Russian power was out of proportion Truman did not properly deal with the situation with Russia because of the disparity in power between the 2 powers and the fact that he was inexperienced FDR believed that postwar peace would only happen if the U.S. and USSR had good relations The interests of big powers in the postwar world were understandable to FDR, even if they were not identical FDR was not an idealist; it was completely possible for the U.S. and USSR to lay terms of peace at the time Russia’s role in postwar Europe was under contention; it believed that all its surrounding states be communist as well This was against American principles of self-determination and freedom They also disagreed about the future of Germany; the U.S. wanted to rebuild it, the USSR believed it was a constant menace And of course, they disagreed about ideology, as the U.S. constantly feared the spread of communist ideology Then, the USSR made a series of actions that deepened these differences Americans saw these actions as ungrateful U.S. reaction to these actions were made clear when the U.S. went ahead and merged its parts of Germany with Britain and France America had a completely different foreign policy toward its dealings with communism The containment policy had two modes of attack; one was to use military force to repel the communists, and the other was to satisfy the demands of countries so that they wouldn’t have any reason to support the communists In this context, the Marshall Plan was a success, as shows by the USSR’s deep hatred toward it Next, NATO helped western European countries to adequately defend themselves from communism The Truman doctrine, which wanted to repel communists in Greece and Turkey, was drawn to the incident between North and South Korea as well It could be doubted that North Korea’s invasion over South Korea was a purely Soviet effort to spread communism to Asia since Europe was now taken The Korean war was the first example of collective security practiced by a formally constituted international organization
For the U.S., it was the first example of resisting aggression outside Europe When the U.S. decided resisting communism militarily and ideologically was necessary, it noticed it had
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