Washington socialites packed picnics to watch an easy Union victory — then fled in terror as the routed army collapsed around them in the Civil War's shocking first battle.
On July 21, 1861, a Union army marched out of Washington expecting a quick, decisive victory that would end the rebellion in one blow. Wealthy civilians followed along in carriages, bringing picnic lunches to watch the show from nearby hills — that is how certain everyone was of an easy Northern triumph.
Confederate spy Rose O'Neal Greenhow sent coded intelligence to General Beauregard revealing Union attack plans before the battle began. On the field, Confederate signal officer Alexander sent one of the first battlefield wig-wag semaphore messages in history, warning of the Union flanking movement.
The battle turned at Henry House Hill, where Brigadier General Thomas Jackson positioned his Virginia brigade on the reverse slope, shielded from artillery. A fellow Confederate general rallied retreating soldiers by pointing at Jackson: 'There stands Jackson like a stone wall!' — earning him the nickname he carried for the rest of his life.
A critical mistake nearly changed everything: the 33rd Virginia wore blue uniforms, and Union artillery commander Major Barry mistook them for friendly troops and held fire. The Confederates captured the Union guns in minutes, and the battle's momentum irreversibly shifted.
The Union retreat became a rout when an overturned wagon blocked the bridge at Cub Run Creek. Soldiers threw down weapons and ran; the panicked civilians who had come to watch found themselves swept up in the chaos. Southern papers gleefully called it 'The Great Skedaddle.'
The battle killed every illusion of a short, easy war. Lincoln immediately signed bills calling for 500,000 more troops and a three-year enlistment — recognizing that this conflict would be long, brutal, and require the full mobilization of the entire nation.