It was the failed Bay of Pigs invasion conflict with Russia over missiles in Cuba active U.S. involvement in Vietnam
The reason there was slavery in the United States is because there was more work to do than people to do it. The North's population grew quicker than the South's, so they could become "moral"quicker
Answer=B
Fur was considered the black gold of the far north.
Being rallied by the Isolationist really, if it wasn't for them now or ever, US would be larger