Robert Harper, a millwright traveling through Maryland in the 1740s, recognized the waterpower potential where two major rivers converged. He bought squatting rights to a ferry crossing for 30 guineas, then purchased 125 acres from Lord Fairfax in 1751. George Washington visited in 1785 while surveying for the Potomac Company and later proposed the site for a federal armory. Construction began in 1799, making Harpers Ferry one of only two national arsenals, the other being Springfield, Massachusetts. Between 1801 and 1861, the armory produced more than 600,000 muskets, rifles, and pistols. Captain John H. Hall pioneered interchangeable parts in firearms here between 1820 and 1840, and his M1819 Hall rifle became the first breech-loading weapon adopted by the U.S. Army. By 1836, the town also hosted the first railroad junction in the United States, where the Winchester and Potomac Railroad met the Baltimore and Ohio.

On the night of October 16, 1859, John Brown and 21 men -- 16 white and 5 Black -- seized the federal armory, hoping to arm an insurrection that would end slavery. They took 60 hostages before local militia and armed townspeople pinned them down in the armory's fire engine house. The Secretary of War dispatched 86 Marines from the Washington Navy Yard under Lieutenant Colonel Robert E. Lee, who arrived in civilian clothes because his uniforms were unavailable, with Lieutenant J.E.B. Stuart as his aide. The Marines battered down the door with a ladder and captured Brown, who was tried in nearby Charles Town for treason, murder, and fomenting insurrection. He was hanged on December 2, 1859. His words during trial and his famous last speech, as one historian wrote, "captured the attention of the nation like no other abolitionist or slave owner before or since."

The Civil War devastated Harpers Ferry. The town changed hands eight times between 1861 and 1865, its topography making it easy to seize but impossible to hold. Surrounded by high ground on three sides -- Bolivar Heights to the west, Loudoun Heights to the south, Maryland Heights to the east -- whoever controlled the ridges controlled the town. In September 1862, Stonewall Jackson surrounded the garrison and forced the largest surrender of U.S. troops until Bataan in 1942: over 12,000 men captured. By war's end, the armory was destroyed, most buildings lay in ruins, and a Massachusetts soldier wrote to his mother that "the whole place is not actually worth $10." Joseph George Rosengarten described the transformation: what had been "a blooming garden-spot, full of thrift and industry" in 1859 was reduced to "waste and desolation" by 1862.

Inspired by Brown's sacrifice, both freed and formerly enslaved people came to Harpers Ferry during and after the war. Storer College, a historically Black institution, was established by Freewill Baptist missionaries on Camp Hill. Frederick Douglass spoke there in 1881. In 1906, Storer hosted the first U.S. meeting of the Niagara Movement, the predecessor of the NAACP, led by W.E.B. DuBois, who called it "one of the greatest meetings that American Negroes ever held." John Brown's Fort -- the old engine house -- became West Virginia's most visited tourist site, a pilgrimage destination for Black Americans. The building was dismantled and shipped to Chicago for the 1893 World's Columbian Exposition, abandoned there, rescued by the Baltimore and Ohio Railroad, moved to a farm, relocated to the Storer College campus, and finally placed near its original site by the National Park Service in 1968.

Today, the Appalachian Trail Conservancy makes its headquarters in Harpers Ferry, and the 2,190-mile trail passes directly through the lower town. Many thru-hikers consider Harpers Ferry the psychological midpoint of their journey, though the true halfway mark lies farther north in Pennsylvania. The National Park Service has rebuilt and preserved much of the lower town that floods and war destroyed, creating Harpers Ferry National Historical Park. Amtrak's Capitol Limited stops here twice daily on its run between Chicago and Washington, and MARC commuter rail connects the town to the capital. The population hovers just above 250, but the weight of what happened here -- an armory that armed a young nation, a raid that cracked open the question of slavery, battles that scarred the landscape, a college that educated the formerly enslaved, a movement that seeded the NAACP -- makes Harpers Ferry one of the most historically dense places in America.