The Southern states used Jim Crow Laws to discriminate African Americans
It was very important for controlling the Mississippi River because it had easier trade since it led off to the gulf of Mexico which was an excellent trading spot, and well the north needed it to make trade easier to obtain
The primary concern was related to the number of congressmen from free and slave states. If Missouri was admitted into the Union as a slave state, the congress would have more Southerners than Northerners in the congress which would be bad for slaves everywhere. Northerners therefore asked that if Missouri enters as a slave state, Maine has to be separated and enter as a free state.<span />
They had successfully organized workers into unions.
The red scare was used to describe the period where the fear of communism was rampant in the US... later macarthyism
