At least, the majority of Confederate soldiers were not fighting to keep slavery.
“Besides, the Civil War was not primarily about slavery. Lincoln did that mid-war as a PR move.”
That’s odd.
Just prior to the Confederate’s attack on Fort Sumter, CSA Vice President Alexander Stephens said the exact opposite. He was clear is his statement that the secession was about slavery.
And, the “Declaration of the Immediate Causes Which Induce and Justify the Secession of South Carolina from the Federal Union” clearly states that slavery was the primary factor for their withdraw from the Union.
Really? The people who fought the war would disagree with you.
"The South had always been solid for slavery and when the quarrel about it resulted in a conflict of arms, those who had approved the policy of disunion took the pro-slavery side. It was perfectly logical to fight for slavery, if it was right to own slaves." [John S. Mosby, Mosby's Memoirs, p. 20]
“Lincoln did that war as a PR move’’. That is without a doubt THE DUMBEST thing I have ever seen posted on the internet.