Fortifications

Fort Buffalo was an earthwork fortification  built by the 21st New York Infantry of the Union army in 1861 and named for the troops’ hometown. During the Civil War, a concentration of forts existed in the Seven Corners section of Falls Church. These structures were used in the Federal defense of Washington. First occupied by Brig. Gen. Irvin McDowell’s troops during the First Manassas Campaign, the fort was briefly occupied by the Confederates following that Federal defeat in July 1861. 

The location of Fort Buffalo  is near Falls Church, Virginia, in Fairfax County on Sleepy Hollow Road south of Leesburg Pike (Virginia Route 7), on the left when traveling south. Near the Seven Corners Fire Station, one block from Seven Corners.( Source - Historical Marker Database )