Why would white Southerners pass laws that controlled the movement of African Americans? What would happen if African Americans left the South in huge numbers?

States' compliance with the native american reservation treaties drawn up by the federal government for the native american nations is:

What role did oregon play in the 1844 presidential election

In the gettysburg address, which rhetorical device does abraham lincoln employ when he says, "the world will little note, nor remember what we say here, but ic never forget what they did here"?