Manassas National Battlefield 10612 Lee Hwy Manassas, VA 20109 Phone : (703) 754-8694 Business Category Security Guard & Patrol Service Detective Guard & Armored Car Services United States Government--interior Department Of The, Manassas National Battlefield Park, Ranger Office Manassas, VA 20108 Phone : (703) 754-8694 Business Category Government Offices & Public Schools