The American Civil War (allthetropes.org)
In 1861, a group of Southern states seceded from the American Union and declared themselves independent as the Confederate States of America. From there events took on a life of their own and the situation devolved into a full-blown war. The war was the result, like so many civil wars, of the failure of internal politics. In this case, the great failure was to resolve tensions over the future of Slavery in America; the ‘Slave States’ feared that the central government in Washington D.C. would attempt to regulate or ban the slave trade and the practice of slavery, an unjustified fear but one understandable in the context of the liberalization of the Northern Free States, where Anti-Slavery groups modeled after their British counterparts had begun to flourish.- American Civil War (en.wikipedia.com)
The American Civil War (April 12, 1861 – May 26, 1865; also known by other names) was a civil war in the United States between the Union (“the North”) and the Confederacy (“the South”), which had been formed by states that had seceded from the Union. The central cause of the war was the dispute over whether slavery would be permitted to expand into the western territories, leading to more slave states, or be prevented from doing so, which many believed would place slavery on a course of ultimate extinction.