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!
Facism stressed nationalism most strongly
Because they were forcibly removed by their employers because many of the men who comprised most of the military returned to their former jobs in the labor force.