08/10/2026
THE FLANK ATTACK THEY NEVER SAW” — THE MARCH THROUGH THE FOREST THAT SHOCKED THE UNION ARMY
Time Period: May 2, 1863
Location: Chancellorsville, Virginia, United States
Historical Event: Stonewall Jackson’s Flank Attack — Battle of Chancellorsville
What if an entire army suddenly appeared behind your flank—before you even realized you were surrounded?
On May 2, 1863, one of the most daring maneuvers of the American Civil War unfolded in the dense forests near Chancellorsville, Virginia.
Union General Joseph Ho**er had brought a massive army into Virginia with the intention of crushing General Robert E. Lee’s Confederate Army of Northern Virginia. The Union forces greatly outnumbered Lee’s army.
But Lee was willing to take an enormous risk.
While Confederate troops confronted the Union army from the front, Lieutenant General Thomas J. “Stonewall” Jackson secretly moved approximately 28,000 Confederate soldiers around the Union right flank.
The movement was extraordinarily difficult.
Jackson’s soldiers marched for miles through dense woods and narrow roads. To maintain secrecy, they avoided making unnecessary noise and tried to conceal their movement from Union observers.
The image captures the terrifying moment when that hidden Confederate force finally emerged from the forest.
Union soldiers in the foreground are positioned among the trees, while Confederate infantry advance through the smoke behind them. The thick woodland made it difficult for soldiers to see what was happening beyond a few dozen yards.
Then, late in the afternoon, the Confederate attack began.
The Union XI Corps was caught largely by surprise.
Confederate soldiers suddenly emerged from the western side of the Union position and attacked its exposed flank.
The shock was enormous.
Union soldiers who had been preparing for a battle from the front suddenly found Confederate troops attacking from an unexpected direction.
Some Union units broke and retreated rapidly.
The sound of gunfire, shouting, artillery, and frightened soldiers moving through the forest created complete confusion.
The Confederate attack pushed the Union line back several miles.
But Jackson wanted to continue the assault after dark.
That decision would lead to tragedy.
While scouting ahead of his own lines later that night, Jackson and several officers were mistakenly fired upon by Confederate soldiers who believed they were Union cavalry.
Jackson was severely wounded.
His left arm had to be amputated, and although he initially appeared to be recovering, complications later developed.
Stonewall Jackson died on May 10, 1863.
His death became one of the most devastating losses suffered by the Confederacy during the war.
Despite Jackson’s injury, the Confederate victory at Chancellorsville became one of Robert E. Lee’s most celebrated battlefield successes.
But it came at an enormous cost.
The Union Army suffered roughly 17,000 casualties, while Confederate losses were around 13,000.
The battle demonstrated how dangerous surprise, deception, and aggressive maneuver could be—even against a much larger army.
And that is why the words “THE FLANK ATTACK THEY NEVER SAW” perfectly capture the moment.
May 2, 1863.
Thousands of Confederate soldiers disappeared into the forest.
The Union army never expected them to emerge where they did.
Then suddenly—
the forest came alive.
The flank was collapsing.
And one of the most famous surprise attacks of the Civil War had begun.