Yeah. The tyrant and his party were generally ambivalent about slavery. Slavery in the north didn’t end until after the war.
That’s one of the grosser distortions of the truth that I’ve seen on the WBTS threads.
First of all slavery had been eliminated in almost every northern state, and the states that still had allowed it had paths to its elimination. It really was largely symbolic though since the slave population in the north was but a tiny fraction of the slave population in the south.
By contrast the southern states not only embraced slavery, they doubled-down on their exploitation of other human beings. They had no intention of ever letting go of their human chattel and would destroy anyone or anything that stood in their way.
The true tyrants were the southron slavers.