How did the US Civil War begin?

The southern states were enraged that Lincoln was elected president, and fearing that he would somehow interfere with slavery, they began to secede from the Union. Some army and navy posts gave up or joined the southern cause. The commander of Fort Sumter, in the harbor at Charleston, South Carolina, refused to surrender and local militia and students from The Citadel began firing cannons at the fort. The fort signaled that it would surrender, but the final volleys by the South Carolina militia set the fort on fire, killing one soldier and hurting many others. When the president, Congress, and the newspapers got word of the fighting, the president gave the order to put down the rebellion by force. All of this happened on April 12 and 13, 1861.