[DiogenesLamp]

...whereas the southern declarations of secession declared their reason WAS to preserve the institution of slavery.

Nobody cares about the Southern reasons for leaving, the only thing that matters is why the Union sent troops to invade them.

Why did Lincoln send troops to invade?

[onedoug]

Because a bunch of Citadel cadets got rowdy?

Though Beauregard evidently gave the order.