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On July 2, Maj. Gen. Robert Patterson's division crossed the Potomac River near Williamsport and marched on the main road to Martinsburg. Near Hoke's Run, Abercrombie's and Thomas's brigades encountered regiments of T.J. Jackson's brigade, driving them back slowly. Jackson's orders were to delay the Federal advance only, which he did, withdrawing before Patterson's larger force. On July 3, Patterson occupied Martinsburg but made no further aggressive moves until July 15, when he marched to Bunker Hill. Instead of moving on Winchester, however, Patterson turned east to Charles Town and then withdrew to Harpers Ferry. This retrograde movement took pressure off Confederate forces in the Shenandoah Valley and allowed Johnston's army to march to support Brig. Gen. [[P.G.T. Beauregard]] at Manassas. Patterson's inactivity contributed to the Union defeat at First Manassas. (''NPS summary'')

On July 2, Maj. Gen. Robert Patterson's division crossed the Potomac River near Williamsport and marched on the main road to Martinsburg. Near Hoke's Run, Abercrombie's and Thomas's brigades encountered regiments of T.J. Jackson's brigade, driving them back slowly. Jackson's orders were to delay the Federal advance only, which he did, withdrawing before Patterson's larger force. On July 3, Patterson occupied Martinsburg but made no further aggressive moves until July 15, when he marched to Bunker Hill. Instead of moving on Winchester, however, Patterson turned east to Charles Town and then withdrew to Harpers Ferry. This retrograde movement took pressure off Confederate forces in the Shenandoah Valley and allowed Johnston's army to march to support Brig. Gen. [[P.G.T. Beauregard]] at Manassas. Patterson's inactivity contributed to the Union defeat at First Manassas. (''NPS summary'')

{{Template:Campaignbox Manassas 1861}}

{{Campaignbox Manassas 1861}}

{{Template:ACW Battles of 1861}}

{{ACW Battles of 1861}}

[[Category:American Civil War Battles]]

[[Category:American Civil War Battles]]