Who started the Civil War in the US?

The South decided to form their own type of government, their own type of money, everything. they decided to secede ( to withdraw voluntarily from a union) from the Union ( that is what the united states was called). There were many reasons for this move, but the main subject is slavery. The North wanted to stay free, but the south had their own things in mind. anyways, the south successfully broke away from the union.

the Confederates started the war in Fort Sumter Charleston, South Carolina