John Brown led a raid on the federal arsenal in Harper's Ferry in 1859 hoping to arm slaves and start an uprising. He was captured, convicted of treason, and hanged. His actions increased tensions between northern abolitionists and southern slaveholders. In 1860, Abraham Lincoln was elected president, despite not being on the ballot in many southern states. As southern states increasingly feared the potential end of slavery, seven states seceded from the United States and formed the Confederate States of America, with Jefferson Davis as its president.