News
September 12, 2008
Battle scene
Hilltop fortress connects Petersburg with its Civil War past

PETERSBURG - It took Union soldiers five months to build Fort Mulligan, but troops under Confederate Gen. Jubal Early captured and ransacked it in a day, leaving it to languish for a century under a thicket of brush in a cow pasture overlooking this Grant County town.

But the hilltop Civil War fortress - perhaps the state's best preserved - is once again a part of Petersburg's landscape. It provides a tangible connection with the area's past and is beginning to attract visitors who will help shape its future.

The fort is named in honor of Col. James A. Mulligan, commanding officer of the 23rd Illinois Volunteers, better known as the Chicago Irish Brigade because of the high percentage of Irish immigrants who served among its ranks. Joining the Irish Brigade in building the fort were cavalry and artillery units from West Virginia, Pennsylvania and Maryland.

1 of 3 Photos
Lawrence Pierce
A flag stand and information booth greet visitors preparing to embark on an interpretive hike through the six-acre site of Fort Mulligan. .
From August to December of 1863, Union soldiers built earthen walls 700 feet long and 400 feet wide and covered them on the outside with an abatis - a bristly layer of sharpened logs and branches to fend off attackers.

The inner walls of the fort were lined with logs. Inside the fort were a series of four bombproofs - log-supported bunkers topped with timbers and covered with a thick layer of dirt in order to withstand artillery fire. The bombproofs were used to store munitions, weapons and food.

Arrayed around the perimeter walls, overlooking the South Branch of the Potomac and roads leading to Moorefield, Franklin and Keyser, were seven artillery pieces.

A total of 68 officers and 1,532 enlisted men were assigned to duty at the fort, and lived in cabins they built on the slopes of Fort Hill.

There was ample Confederate activity taking place in the valley to keep them busy. McNeill's Rangers and other Confederate raiders frequently attacked federal supply wagon trains passing through the South Branch Valley, and sabotaged nearby sections of the Baltimore & Ohio Railroad.

The year before the fort was built, Maj. Gen. John C. Fremont and 20,000 Union troops camped at the hilltop site in response to the Confederate threat.

Despite the work that went into building Fort Mulligan and maintaining a garrison here, the structure was never really tested in battle.

In early January of 1864, a large Confederate force led by Maj. Gen. Fitzhugh Lee, Robert E. Lee's nephew, moved into the South Branch Valley with intentions of capturing the fort, but was stalled by mud and rain. At

the end of January, the Confederates captured an 80-wagon supply train destined for the fort, and a force of 4,700 southerners led by Gen. Jubal Early approached the outskirts of Petersburg and set up artillery to lay siege to the fort.

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