Confederate General Thomas “Stonewall” Jackson captures Harpers Ferry, Virginia (present-day West Virginia), and some 12,000 Union soldiers as General Robert E. Lee’s army moves north into Maryland.
The Federal garrison inside Harpers Ferry was vulnerable to a Confederate attack after Lee’s invasion of Maryland in September. The strategic town on the Potomac River was cut off from the rest of the Union army. General George B. McClellan, commander of the Army of the Potomac, sent messages to Union General Dixon Miles, commander of the Harpers Ferry garrison, to hold the town at all costs. McClellan promised to send help, but he had to deal with the rest of the Confederate army.