Ideology of conservatism.
I hope this helps!
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 had the strongest Navy and dominated both the Pacific and the Atlantic uncontested; this didn't change throughout the Cold War, even though naval technologies changed a lot (nuclear subs, etc), and the USSR invested heavily in surface and submarine navies.
Explanation:
