 Pari gbolohun yii: Fort Lyon nigbagbogbo Camp Lyon ni awọn igbasilẹ Ariwa jẹ igi ati ile-iṣẹ ilẹ ti a kọ ni guusu ti Alexandria, Virginia gẹgẹbi apakan ti awọn idaabobo ti Washington, D.C. nigba Ogun Ilu Amẹrika. A kọ ọ ni awọn ọsẹ ti o tẹle ikuna Union ni : Bull Run, Fort Lyon wà ní Ballengers Hill ní gúúsù Hunting Creek, àti Cameron Run tí ó ń bọ sínú rẹ, nítòsí Òkè Eagle. Lati ipo rẹ lori ọkan ninu awọn aaye ti o ga julọ ni guusu ti Alexandria, odi naa foju Telegraph Road, Columbia Turnpike, Orange ati Alexandria Railroad, Little River Turnpike, ati awọn ọna guusu si ilu Alexandria, ibugbe ti o tobi julọ ni Northern Virginia ti Union. 