The Federal army reaches Centreville in northern Virginia, while Joseph E. Johnston’s Confederates slip out of the Shenandoah Valley undetected and head east.
Robert Patterson feebly tries to engage Joseph E. Johnston’s Confederates in the Shenandoah Valley, but Johnston has other ideas.
Various detachments of Federal and Confederate forces maneuver toward a confrontation in Unionist western Virginia.
Federals led by Charles P. Stone seize two key ferries on the Potomac River while Confederates begin stirring at Leesburg, Va.
Confederates abandon Harpers Ferry in northwestern Virginia as Federals cautiously prepare to enter that part of the state.