but the North owned slaves and still owned them after the war. Maybe the south was more adamant about it, but the north had them as well. It was the practice of the country at the time agreed?
I think we can all agree you are incredibly ignorant about slavery and the Civil War.
Prior to the Civil War, slavery was legal in half of the states- and illegal in half the states.
The vast majority of slaves were held by the States that attempted to secede to protect their right to own humans.
The 1860 Census and Slavery in the United States
Deep South states held the most slaves and this is where most of the larger plantations existed. Mississippi’s slave population stood at 55% out of a total population of 791,305. South Carolina’s slave population represented 57% of the total population. These percentages decrease with upper South states like Virginia (31%), Tennessee (25%), and Kentucky (20%). Border States like Maryland accounted for the lowest numbers (13%).
Most of the slave states did try to secede- a few did not
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The 'country' had no legal way of outlawing slavery other than by a Constitutional Amendment- which is what the 13th Amendment did.