- September 12–15, 1862
- Jefferson County, West Virginia
- Loudoun County, Virginia
- Washington County, Maryland
Principal Union Commanders
- Brigadier General Julius White
- Colonel Dixon S. Miles
Principal Confederate Commanders
- Major General Thomas “Stonewall” Jackson
- Major General Lafayette McLaws
- Brigadier General John G. Walker
Union Forces Engaged
- Harpers Ferry Garrison
- Martinsburg Garrison
Confederate Forces Engaged
- Army of Northern Virginia Detachment
Number of Union Soldiers Engaged
- Roughly 14,000
Number of Confederate Soldiers Engaged
- Roughly 21,000–26,000
Estimated Union Casualties
- 12,636 (44 killed, 173 wounded, 12,419 captured)
Estimated Confederate Casualties
- 286 (39 killed, 247 wounded)
- Confederate victory
- The commander of the Union garrison at Harpers Ferry, Colonel Dixon S. Miles, was mortally wounded by a Confederate shell just after deciding to surrender.
- Brigadier General Julius White surrendered the Union garrison at Harpers Ferry to Confederate General Thomas “Stonewall” Jackson on September 15, 1862.
- Confederate General Thomas “Stonewall” Jackson’s victory at the Battle of Harpers Ferry was one of the greatest of his storied career.
- Confederate General Thomas “Stonewall” Jackson’s victory at the Battle of Harpers Ferry resulted in the largest surrender of Union soldiers during the American Civil War.
- Confederate General Thomas “Stonewall” Jackson’s victory at the Battle of Harpers Ferry convinced General Robert E. Lee to continue his Maryland Campaign. Two days later, Lee’s decision led to the bloodiest single day of battle during the Civil War on September 17, 1862, along the banks of Antietam Creek near Sharpsburg.
- The Battle of Harpers Ferry was the largest engagement of the Civil War fought in present-day West Virginia.
Timeline of the Maryland Campaign
These are the main battles and events of the Maryland Campaign in order.