After Abraham Lincoln's election in 1860, some southern states chose to secede from the Union because of his position against slavery.
Abraham Lincoln was the candidate of the Republican party. His position against slavery was public. The southern states based their economic activities on the slave labor force system. When Lincoln won the election, they saw their interests threatened and feared the abolition of slavery.
In December of 1860, 7 southern states secede from the Union and created a provisional government in Montgomery, Alabama.
The following year, after hostilities had begun, 4 more Southern states joined, giving birth to the Confederate States of America.
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