It is called the second war for American independence because in this war Americans fought for their rights. They fought for the rights of neutral trade. So therefore it was their second time fighting for independence.
When you have a lack of knowledge on things like the Constitution, you don't know things about segregation laws. Which causes segregation to be posible
They were called "Border Ruffians"
A, Washington encouraged isolationism, Monroe instituted his doctrine, then imperialism, and finally interventionism to prevent communism and protect business interests