The 13th was the one that abolished slavery. The 14th wouldn't have been written if the Federal Union full of Yankees hadn't been so eager to bankrupt the south. Just like modern day Federal mandates and income and estate taxes that take property without just compensation, the 14th got the Union out of having to compensate Southern property owners for their legally held property. This was just another deft end run around the last clause in the 5th Amendment that the Yankees made, while they held absolute power in Congress, and "saved the Union".
The 13th was ratified voluntarily by the Southern states in 1865, while most of their legislatures were reasonably intact, three years before the 14th. When the South pitched in voluntarily to ratify the 13th Amendment, they expanded the jurisdiction of the Emancipation Proclamation to the Northern States. It's quite conceivable that Georgia's legislature helped free U.S. Grant's and Mary Todd's slave(s).
The 13th was the one that abolished slavery.
My point still holds; without so-called secession, and treason, the 14th amendment, as written, would never have existed.
Walt