The Battle of Aldie took place on June 17, 1863, in Loudoun County, Virginia, as part of the Gettysburg Campaign of the American Civil War.

Maj. Gen. J.E.B. Stuart's cavalry screened Gen. Robert E. Lee's Confederate infantry as it marched north in the Shenandoah Valley behind the sheltering Blue Ridge Mountains. The pursuing Union cavalry of Brig. Gen. Judson Kilpatrick's brigade, in the advance of Brig. Gen. David McM. Gregg's division, encountered Col. Thomas T. Munford's troopers near the village of Aldie, resulting in four hours of stubborn fighting. Both sides made mounted assaults by regiments and squadrons. Kilpatrick was reinforced in the afternoon, and Munford finally withdrew toward Middleburg.