Forcibly conscripted men going to war solely to end involuntary servitude has always struck me as an odd thing to believe anyway.
Lincoln's biggest political mistake was the emancipation proclamation. He turned a war that was seen (rightly) by most people as a fight to preserve the union into a conflict over the slavery issue. Most people in the north and a minority but not insignificant number in the south were willing to fight and die to preserve the union, or to send their sons to do the same. Not many, no matter how repugnant they found slavery, would do the same.
And forcibly conscripting men solely to preserve involuntary servitude makes more sense? The Confederacy enacted conscription in the spring of 1862. At the same time they forcibly extended the enlistment of all the current soldiers for the duration of the war. After that point literally every Confederate soldier who fought, fought because they had to. Union soldiers could leave at the end of their enlistment, an option denied rebel soldiers.
Yup. Another thing I eventually realized didn't make any sense was Lincoln's Gettysburg address. That "Four score an seven years..." statement refers to 1776 when a group of slave owning states was attempting to break away from a Union, (United Kingdom) and had their armies led by a slave owning General from Virginia.
Total cognitive dissonance.