I am going to answer something which you didnt ask, i know it will not help you with this assignment but knowledge wise it is interesting. As to did the north have a right to invade the south. The USA stands for the United States of America, this you probably know but if we are just a united group of states shouldn't we be allowed to leave the union? Also many people will take the question of reasons behind the civil war and say slavery..please do not make this mistake. Slavery might be one reason but thier is a whole slew of other reasons. I do not know what kind of student you are but if you are at all like me these points are interesting and at least give you something to waste time thinking back