Just north of Martinsburg they encountered a brigade of Virginians commanded by Brigadier General Thomas J. Jackson .
Patterson 's army crossed the Potomac River on July 2 at Falling Waters and advanced toward Martinsburg , Virginia .
Just north of Martinsburg army encountered a brigade of Virginia commanded by Brigadier General Thomas J. Jackson .
Patterson 's army crossed the Potomac River on July 2 at Falling Waters and advanced toward Martinsburg , Virginia .