Respuesta :
The Answers are:
2. Robert E. Lee
3. Mason-Dixon
1. Seceded after fall of Ft. Sumter
North Carolina, Tennessee, Old Dominion, Arkansas - Seceded after fall of Ft. Sumter, Robert E. Lee - greatest Southern general, Mason-Dixon- dividing line between North and South.
Why was the Mason-Dixon Line important?
Mason-Dixon Line was created to maintain the boundaries between the three countries that are British colonies of Maryland and Pennsylvania. But the maps and direction in the maps was not correctly drawn which results in overlapping.
Thus, the sentence are matched.
For more details about Mason-Dixon Line, click here:
https://brainly.com/question/4891777
#SPJ2