After fighting for three hours the battle was finally decided by a gallant charge of the 1st Maine Cavalry, who, after our line had been broken and driven back, were led by Kilpatrick in person, against a regiment of mounted infantry on the Ashby's Gap road, capturing four guns.

The Harris Light Cavalry had been in disfavor for having failed in an attack at Brandy Station, but on the present occasion they redeemed themselves, made several brilliant charges, and greatly contributed to the success of the day.
The rebels claim to have taken 134 prisoners, and some flags in this affair, and state that they only fell back to Middleburg in obedience to Stuart's orders.

Ascertaining that Colonel Duffie was advancing on that place with his division, Stuart thought, by concentrating his entire force there, he could overwhelm him.

This may account for the retreat, but it is very certain that the loss of the pass at Aldie was a serious blow to the rebel cause.

This, supplemented by Colonel Duffie's operations, which will be described hereafter, gave Hooker possession of Loudon County, and threw the invading column far to the west.