Comment Re:Ukraine's borders were changed by use of force (Score 1) 304
At the start of the war holding slaves was not unconstitutional, each state made their own laws and there was slavery on the Union side as well. The United States simply did not want 30% of their population and 70% of their exports seceding away, it would totally cripple their economy. The Emancipation Proclamation in 1863 - long after the war started - was just directed at the slaves in states in rebellion, those under Union control still remained in slavery. In short, it was a wartime measure to cripple an armed rebellion and recruit soldiers to their own side. I'm sure the Lincoln movie is not the most accurate historic source but there was huge doubt if the proclamation had any force once the war was over or if they'd all be returned to slavery.
There was huge resistance to passing the 13th amendment even with the southern states broken away, it was rejected as late as 1864 and only passed with the smallest possible 2/3rds margin (119-56) through the House in 1865 before the South rejoined. And that was only after years of negros serving in the Union army and dying for the north, at the start of the war... no. The abolitionists might have been on the rise but in 1860 support for slavery was alive and well all over the United States. They might have climbed to the moral high ground during the war, but initially it was a simple case of the government fighting down a rebellion like any other.