Brent, As I have said from day one, not one Southern State went to war over the institution of slavery., even though Mississippi said " "Our position is thoroughly identified with the institution of slavery--the greatest material interest of the world." There was more to this secession doc if people will just read and by reading they will find there is no declaration in that doc.
I have shown that Buchanan and Lincoln both sent their Star Of The West expeditions to Sumter for the "collection of revenue." The fact the South was being invaded was the reason they went to war.
Yes it is that simple.