The answer is slavery. The Republicans were anti-slavery, while the democratic south was pro slavery. Eventually that, and a couple of other things, led to the Civil War.
Sorry if this was a bit late, Brainly had just recommended this question for me to answer, but I hope this helps!
ANSWER: The US and Cuba were in non-physical conflict during the 60's. The main most important event going on around this time period was The Cold War. America desired to prevent the Spread of Communism without going into actual war. Cuba finally converted to Communism in the 60's after it's years of civil problems, concerning the United States.
SHORT FACTS:
-The US made an attempt to frame Cuba in order to gain reason for taking action
-The action failed, causing an almost nuclear war between Russia, US, and Cuba
Hope this Helps!
