Harpers Ferry Raid, (October 16–18, 1859), assault by an armed band of abolitionists led by John Brown on the federal armory located at Harpers Ferry, Virginia (now in West Virginia). It was a main precipitating incident to the American Civil War.
The raid on Harpers Ferry was intended to be the first stage in an elaborate plan to establish an independent stronghold of formerly enslaved people in the Adirondack Mountains—an enterprise that had won moral and financial support from several prominent Bostonians. Choosing Harpers Ferry because of its arsenal and because of its location as a convenient gateway to the South, John Brown and his band of 21 recruits (his 2 sons, 14 white men, and 5 Black men), seized the armory on the night of October 16.
Sporadic fighting took place around the arsenal for two days. On October 18, combined state and federal troops (the latter commanded by Col. Robert E. Lee and including Lieut. Jeb Stuart) subdued Brown and his collaborators. Seventeen men died in the fighting. Brown was indicted for treason on October 25. He and his six surviving followers were hanged before the end of the year.
Although the raid on Harpers Ferry was denounced by a majority of Northerners, it electrified the South—already fearful of rebellions of enslaved people—and convinced Southern planters that abolitionists would stop at nothing to eradicate slavery. It also created a martyr, John Brown, for the antislavery cause. On the evening of October 30, 1859, transcendentalist Henry David Thoreau delivered a speech “A Plea for Captain John Brown” in Concord, Massachusetts. In his speech he made an impassioned plea for Brown’s cause and sought to portray him as a Christ-like figure whose violent actions were justified by the moral imperative to end slavery. When he later learned that Brown had been executed, Thoreau said:
I heard, to be sure, that he had been hanged, but I did not know what that meant—and not after any number of days shall I believe it. Of all the men who are said to be my contemporaries, it seems to me that John Brown is the only one who has not died.