What agreement limited slavery in western territories to lands south of the 36 30 line?

Why did the south decide to fight a defensive war 1.to protect their plantations 2.to make the north look like the aggressor 3.to take advantage of their knowledge of the land 4.to make maximum use of the limited transport system

What would lead a historian to consider two events to have a relationship of correlation rather than causation?

In order to maintain national security within its colonies in america, england constructed a series of forts along colonial boundaries for protection. true false