The three primary reasons are <em>the requirements for Confederate states to reenter the Union; overseeing the rebuilding of a Southern economic infrastructure; the fate of millions of freed slaves.</em> These were the main issues and hot topics of American Civil War during that time.
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The Soviet Union broke up into a number of independent, noncommunist states in 1991. The largest former Soviet state is Russia. Germany was reunited as East Germany and was no longer separated from West Germany by the Berlin wall. As a result of these changes, Eastern Europe began to transition from communism to democracy. As the iron rule of the former Soviet state was lifted, longstanding ethnic conflicts erupted in some formerly communist states.
