Before Meade's infantry began to march in earnest in pursuit of Lee, Buford's cavalry division departed from Frederick to destroy Imboden's train before it could cross the Potomac. Hagerstown was a key point on the Confederate retreat route, and seizing it might block or delay their access to the fords across the river. On July 6, Kilpatrick's division, after its success raiding at Monterey Pass, moved toward Hagerstown and pushed out the two small brigades of Chambliss and Robertson. However, infantry commanded by Brig. Gen. Alfred Iverson drove Kilpatrick's men back through the streets of town. Stuart's remaining brigades came up and were reinforced by two brigades of Hood's Division and Hagerstown was recaptured by the Confederates.