Answer:
The Union will have a much much larger army, not only because it did IRL, but a third of the confederate population were slaves and were not allowed to fight, and because there is an almost 20% population gap between the two.
Explanation:
History, for one. Communism is mostly attributed to Karl Marx, whom believed that workers are abused by the upper class. Communism is mainly the belief that one "takes as he needs" rather than own more than what is needed. This idea has failed in practice as Joseph Stalin abused the system.
Answer: Nixon and Soviet General Secretary Leonid Brezhnev signed the ABM Treaty and interim SALT agreement on May 26, 1972, in Moscow. For the first time during the Cold War, the United States and Soviet Union had agreed to limit the number of nuclear missiles in their arsenals.