Seems to be huge disagreements
My understanding : it was not about freeing the blacks . Lincoln never wanted to deal with slavery . He did not love it but thought it would disappear.
The South after the Mexican War was extremely paranoid that Lincoln was going to free slaves and ruin their economy . He was not !!!
The North did not want to lose the rich and valuable agriculture of the South
War was about paranoia and $$$$
Many of the dead were young Irish kids .
Ending slavery was a byproduct and the only good thing to result