The Union army panicked after the disaster at Bull Run. They desperately needed to secure the Potomac River crossings, especially the vital Chain Bridge, so they sent thousands of soldiers into the Virginia hills with axes and shovels. They chopped down entire forests. By September 1861, the 4th Vermont Infantry had hacked out a massive, earth-walled fortress they named Fort Ethan Allen. It was huge. The fort stretched over a perimeter of 730 yards, bristling with thirty-nine heavy cannons that could sweep the roads leading from Falls Church. This was no temporary camp. Soldiers dug deep trenches, built timber-framed bombproofs to survive artillery bombardments, and lived in drafty wooden barracks surrounded by thick Virginia mud.
Actually, those big guns never fired a shot in anger. Confederate cavalry leader Jeb Stuart skirmished nearby, but his men knew better than to charge these formidable earthworks. So the fort became a giant, muddy waiting room. Thousands of bored soldiers fought off typhoid, drank bad whiskey, and drilled until their feet bled. It also became a sanctuary. Hundreds of escaped enslaved people crossed the Union lines and found refuge under the protection of these guns, working as paid laborers for the garrison. Today, the park off Military Road still holds these scars. You can walk right up to the surviving parapets, where the high earthen berms and deep gun emplacements remain remarkably intact. No fake reconstructions. Just the raw dirt piled up by desperate men over a century and a half ago.
