Proletarian, the slave states fought the war, not to end slavery, but because the issue of slavery caused the war. Very simple.
It was the actions by the Fed that led to the war.
Let's recap:
The Northern industrial interests had put in place a number of tariffs that were crippling the agricultural southern economy.
North and South had effectively been two very different entities for some time.
The last straw (the trigger) came with attempts to end slavery, which touched upon the numerous underlying issues, the destruction of the Southern economy and thew overstpeeing of Constitutional limits on power by the Fed being the two most greivous matters.
A number of States exercised their Constitutional right to secede from the union.
Under pressure from Northern businessmen who needed Southern cotton (yet who, being stupid Bourgeoisie, still were ready to destroy the economy that provided the cotton as they waged class warfare against the South) Lincoln refused to remove Union troops from lands claimed by the CSA, restocking Fort Sumter and placing the Union army in position to strike.
Possibly fearing a union attack, the CSA attacked Fort Sumter. Noone was killed during the conflict.Having forced the CSA's hand as intended, Lincoln declared war of the CSA.
Some time into the war, Lincoln realized that he needed the best propaganda around. The decision was made to make this not a war over the morality of self-determination, but of slavery. Lincoln declared the slaves in the rebel states free. Slaves in loyalist states could go fuck themselves, because Lincoln never cared about the ******* except as political pawns(kinda like modern-day Democrats).
The CSA won many battles due to good tactics, but lost the war due to poor strategy and the disadvantage posed by any agricultural nation fighting against an industrial nation (the railroads and the standardization thereof in the North but not in the South proved critical). The States were readmitted, allowed into congress, kicked out on Congress top pass the 14th Amendment, then recognized yet again.
Ever since, the American people's right to self-determination is longer recognized, the States lost must of their autonomy, the Fed has secured its power, the Constitution is no longer enforced, and the Bourgeois have continued to send American children to die to defend their financial interests in Cuba, Argentina, Viet Nam, Korea, and a number of other nations.