Last week marked the anniversary of the Battle of Antietam. In a single day over 20,000 men were killed, wounded, or went missing. It was the bloodiest day of the bloodiest war in American history. Lee had lost a large part of his Army of Northern Virginia, but managed to escape back across the Potomac to the relative safety of the Shenandoah Valley. Despite driving Lee out of Maryland, the Army of the Potomac under George McClellan failed to follow up with a decisive victory. In the days and weeks that followed the two battered armies took time to regroup and reorganize for the next campaign.
McClellan’s inaction through late September and early October was a source of great annoyance for President Lincoln and other members of the Union war department. General-in-Chief Henry Hallack wrote that “The long inactivity of so large an army in the face of a defeated foe, and during the most favorable season for rapid movements and a vigorous campaign, was a matter of great disappointment and regret.” For his part, McClellan countered that he desperately needed equipment and feared overextending his bloodied army. It wasn’t until October 26th that the Army of Potomac lurched into motion. Long lines of soldiers, artillery, and wagons moved across the Potomac at Berlin (modern Brunswick, Maryland) and into Loudoun County. The coming campaign would take them straight into the heart of the Heritage Area.

The bulk of Lee’s army was resting in the Shenandoah Valley, near Winchester when reports of the Union advance reached him. Fearful that a rapid movement might cut him off from Richmond, Lee rushed to get his troops out of the Shenandoah and east of the Blue Ridge. To delay the US forces as long as possible he called on his cavalry commander, JEB Stuart, to ride into the Loudoun Valley. The Confederate cavalry crossed the mountains on October 30th and prepared to fight.
Skirmishing between US and Confederate cavalry began the next day in the vicinity of Mountville and Aldie, as Stuart’s troopers drove the blue clad horsemen back. Fighting continued the next day near the village of Philomont. Men of the 8th Pennsylvania Cavalry were ambushed while crossing a ford across the frigid North Fork west of town. Soon reinforcements were pouring in on both sides, and for several hours the action raged back and forth. The fighting only dies down as the sun began to set, and the Confederates withdrew west towards the village of Unison.

Reinforced by infantry, the Union force continued their advance early on November 2nd. The band of the 6th US Cavalry played “Listen to the Mockingbird” as the men moved south in the direction of Unison. The pleasant morning was interrupted as they reached Dog Branch. Confederate troops controlled the ford across the stream, much as they had the previous day. The Union commander, Alfred Pleasanton, used his infantry to pin down the Confederate defenders, while his cavalry fanned out along the nearby roads and tried to flank the rebels. Outmaneuvered and outnumbered, the Confederates fell back to the outskirts of Unison.
JEB Stuart deployed nearly 600 men and six artillery pieces on a line through the village, intending to delay the US troops as long as possible. The open ground east of the village gave them a perfect field of fire as the Union force came into view. Soon the artillery opened up from the high ground near the Methodist Church. Federal guns replied in kind, and an artillery duel continued for an hour. Caught between the guns were the citizens of Unison who cowered in their cellars as the shells flew overhead.


The artillery fire did little to slow the Union advance, however, and within an hour Stuart pulled his men back once again. The next line of resistance was located on the high ground near the South Fork Quaker Meeting House and cemetery. Troops from both sides used the area’s numerous stone walls for cover, and Stuart later wrote that they “afforded the enemy as good shelter as ourselves.” By 2:00 PM, US infantry drove the rebels from the meeting house and on to Beaverdam Creek. Skirmishing through the wooded and broken ground continued throughout the afternoon, as the Confederates retreated past Welbourne and Crednal.
Fighting erupted again on the morning of the 3rd, as Stuart made his stand along Pantherskin Creek north of Upperville. Union forces advanced along Trappe, Green Garden, and Willisville Roads in an attempt to drive off the rebels. As the day wore on the Confederate line collapsed and fell back westward towards Ashby’s Gap. As they did they passed by Oakley, home of diarist Ida Dulany. She recorded the events of the 3rd in her diary, writing “For about an hour we watched the battery pouring out shells against our battery, which was planted in the vineyard. The shells from both batteries burst in full sight of us, frightening the servants nearly to death.”

Although the Loudoun Valley Campaign and the Battle of Unison are often overlooked, the desperate skirmishing that took place would have an immense impact on the war. By the end of November 3rd, JEB Stuart and his men had been driven from the Loudoun Valley, but they had accomplished their mission. For three days they held up the Union advance, backing up the roads of Loudoun County with tens of thousands of soldiers and slowing McClellan to a crawl. Lee was able to move his infantry out of the Shenandoah Valley and in place to defend Richmond. The killing blow that Lincoln had hoped for was doomed.
The Loudoun Valley Campaign would prove to be the last for George McClellan. Frustrated by another blown opportunity, Lincoln decided to act. Late on the night of November 6-7th a courier from the War Department arrived at McClellan’s headquarters tent outside of Rectortown. He carried a copy of General Orders No. 182, stating:
By direction of the President of the United States, it is ordered that Major- General McClellan be relieved from the command of the Army of the Potomac, and that Major-General Burnside take the command of that army. By order of the Secretary of War.
Many of the sites where the fighting occurred that fall are much as they would have been over 150 years ago. The road network around Unison is largely unpaved, giving the modern traveler a way to experience the area as the soldiers did. The Virginia Piedmont Heritage Area also works to encourage preservation of the battlefield landscape through the The Bondi Family Land Conservation and Battlefield Preservation Fund, which helps cover administrative costs for landowners looking to place battlefield land in the Unison area in permanent conservation easements.