What term was used to describe the rough divide between free and slave states by the mid-1800s?

Why didn’t the united states participate in the league of nations? the u. s. senate did not want the country to join. president wilson did not want the country to join. the league of nations was only for european countries. the league of nations had failed to prevent world war 1

Which statement about the draft during the vietnam war is true a. many young men were drafted b. only college students were drafted c. both men and women were drafted d. the military was made up entirely of volunteers

What does the term “escalation” refer to?