He acused other senators of forcing Kansas to be a slave state, and also he also made such personal accusations as that the other senators saw themselves as similar to medieval knights, or making fun of the other senators in other ways.
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It was "Karl Marx" who envisioned a classless society, with common people in charge of their destiny, since this was the basis of communism, which came to fruition most famously in the Soviet Union.
A proxy war is a conflict inflicted by a major power or powers that do not become involved in it directly. Often, proxy wars involve countries fighting their opponents' allies or helping their allies fight their opponents. The number of proxy wars increased gradually since the beginning of the Cold War.
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The Truman Doctrine was basically a shot at the Soviet Communism and how it wasn't right, so this obviously angered the Soviets. The Doctrine caused a divide between the communists and non-communists, which did indeed grow tension between America and the Soviet Union which eventually would lead to the Cold War.