Union General Robert Patterson’s division crossed the Potomac marching for Martinsburg, Virginia on July 2nd 1861. Two of his Brigades under the command of Colonel John Joseph Abercrombie and Colonel George Henry Thomas ran into some of Colonel Thomas J Jackson’s men near Hoke’s Run. The Union troops slowly pushed Jackson’s men back. Jackson’s orders were to delay any Union advances, which he accomplished in the face of Patterson’s much large force.
Patterson continued his move toward Martinsburg, occupying the city on July 3rd 1861. This small battle produced about 23 Union casualties and about 91 Confederate ones.
Another web site about this battle can be found at Falling Waters Battlefield Association