Well, I stopped reading when the poster wrote ‘succession” instead of ‘secession.” If you can’t even get the operative term right, you have no credibility.
A succession of events and prevailing thoughts made cause for the Southern States to secede.
They were ultimately unsuccessful and ceded to Northern aggressions in which the Union Forces successfully forced the Confederates to accede to demands for peace.
It wasn’t the poster who wrote that, it was the author.