On the morning of September 13, 1862, a stretch of farmland outside Frederick, Maryland, still bore the traces of a Confederate camp that had emptied only hours before. The column was gone, its wagons already rolling north before first light. What it left behind looked like nothing at all: trampled clover, a few cold fire pits, the ordinary litter of an army on the move. Two soldiers of the 27th Indiana stopped to rest in that same field.
One of them, Corporal Barton Mitchell, noticed something lying in the grass: a torn envelope wrapped around three cigars. Beneath the cigars was a folded sheet of paper, several pages long, written in a clerk’s hand and addressed to a Confederate general. Mitchell and Sergeant John Bloss carried it to their company commander, Captain Peter Cop. Passing along a stray Confederate document was routine enough by then.
What set this one apart was something none of the men holding it could judge for themselves. Cop sent the paper up the chain to his regimental commander, Colonel Silas Colgrove, who carried it to headquarters. There, an aide looked at the signature at the foot of the page and recognized it immediately: Robert Chilton, assistant adjutant general to General Robert E. Lee.
By that same evening, the document had reached Major General George McClellan, commanding the Union Army of the Potomac. In the space of a single afternoon, it had passed through the hands of a corporal, a sergeant, a captain, and a colonel. What McClellan was holding was Lee’s Special Orders No. 191.
It set out, column by column, exactly how the Confederate army had been broken apart for its invasion of Maryland. Four separate bodies of troops, each with its own route, its own schedule, its own objective. It read less like a general’s plan and more like a timetable. For the first time in the campaign, the Union commander was no longer guessing where his opponent stood.
He now knew in writing that Lee’s army had been split into four pieces scattered across the Maryland countryside, too far apart to reinforce one another on short notice. It was the kind of advantage a general is handed once, if ever, in a career. It had cost the Confederacy nothing more than a careless moment at a campsite outside Frederick. Four days later, the army whose entire plan had just been read by its enemy did not turn back toward Virginia.
It stood its ground along a shallow stream called Antietam Creek on the outskirts of a small Maryland town named Sharpsburg. Over the twelve hours that followed, across a stretch of farmland barely three miles wide, the two armies together lost 22,717 men killed, wounded, or missing. No other day in the country’s history, before or since, has cost that many casualties in so short a stretch of daylight. Robert E.
Lee had held command of the Army of Northern Virginia for a little over three months. He had been born in January 1807 at Stratford Hall in Westmoreland County, Virginia, son of Henry Lee, the Revolutionary War cavalry officer known as Light-Horse Harry. By the time his son was born, the family’s reputation had already begun to curdle. Henry Lee lost most of the family money in land speculation, and in 1812 was badly beaten while defending a newspaper editor against a political mob in Baltimore.
He left for the West Indies and did not come home, dying in 1818 on his way back to Virginia. Lee entered West Point and graduated in 1829, second in a class of forty-six, without a single recorded demerit across four years. What followed carried no glory at all: seventeen years in the army’s engineer corps, building coastal fortifications along the Atlantic seaboard without a single battle to his name. His first real test as a field commander came in September 1861 in the mountains of western Virginia at Cheat Mountain, and it ended in defeat, undone by faulty intelligence and coordination that never came together in time.
The Richmond press mocked him as “Granny Lee” and the “King of Spades. ”
Jefferson Davis judged him differently. On June 1, 1862, after General Joseph Johnston went down wounded at the Battle of Seven Pines, Davis handed Lee command of the army defending Richmond. That confidence was tested almost at once.
From June 25 to July 1, in the running fight known as the Seven Days, Lee commanded a large army in real combat for the first time, against a Union force that had advanced to within a few miles of the Confederate capital. The fighting cost both sides together something in the neighborhood of 36,000 men killed, wounded, or missing. But the Union army was pushed back down the peninsula, and Richmond was safe. Two months later, Lee raised the stakes.
From August 28 to 30, at the Second Battle of Bull Run, he did something a cautious commander does not ordinarily do in the presence of a larger enemy: he split his army in two. One half under Thomas Jackson marched around the Union flank to strike the supply depot at Manassas Junction, drawing the Federal army into a fight on ground Jackson had chosen. The other half under James Longstreet held back until the moment came to deliver the counterattack that broke the Union line. Casualties ran somewhere between 8,000 and 10,000 on each side.
It worked again. A victory won twice by the same method against long odds tends to stop looking like a gamble and start looking like a formula. On September 4, 1862, Lee’s army, carrying on paper something close to 70,000 men, crossed the Potomac and marched into Maryland. Five days later, at a headquarters on the best farm outside Frederick, Lee issued Special Orders No.
191. It divided the army into four columns. Three, all under Jackson, were sent to encircle and take the federal garrison at Harpers Ferry. The fourth, under Longstreet, stayed behind to hold the mountain passes and screen the rest of the army while Jackson finished the job.
Jackson, taking no chances, copied the order out in his own hand and sent it along separately to General Daniel Harvey Hill. It was the other copy, the one sent directly from Lee’s own headquarters, that never reached Hill at all. Exactly how it went missing has never been settled with confidence. What is certain is only where it turned up next: lying in a field for anyone to find.
Before that discovery caught up with the campaign, the mountains themselves had already extracted a price. On September 14, Union troops attacked the passes at South Mountain. At Fox’s Gap, two general officers fell within a short distance of one another: Jesse Reno commanding the Union 9th Corps, and Samuel Garland Jr. leading a Confederate brigade of North Carolinians.
Union losses for the day ran to roughly 2,325 men; Confederate losses higher still at 2,685, including 800 missing, a proportion large enough to suggest how close the defense had come to breaking entirely. The next day, the Union garrison at Harpers Ferry surrendered to Jackson’s forces, handing over roughly 12,000 prisoners, 73 artillery pieces, and some 13,000 small arms. Colonel Dixon Miles, the Union commander, had already agreed to the terms of surrender when a last Confederate artillery round struck him, wounding him mortally. On September 16, Lee put his reasoning in writing in a letter to Jefferson Davis, explaining why he had decided to pull the scattered pieces of his army together at Sharpsburg rather than retreat across the river.
Something else had been weighing on him physically. In late August, his horse Traveler had startled while he stood holding the reins, throwing him hard enough to break a small bone in one hand and badly sprain the other. For much of the campaign he could not properly hold his own reins and rode part of the way in an ambulance. At first light on September 17, artillery on both sides opened along the low ground bordering Antietam Creek.
Historians generally put the number of Confederates present that morning between 30,000 and 45,000 men, well short of the roughly 70,000 who had crossed the Potomac two weeks earlier. Against them stood a Union army approaching 87,000 drawn from three separate corps. The battle opened at its northern end around a small whitewashed meeting house and in the cornfield beside it, where Union troops advancing at dawn ran into Confederate divisions under Stonewall Jackson waiting among the stalks. Within the hour, the cornfield had changed hands several times over.
By mid-morning, the fighting shifted south to a sunken farm lane that Confederate troops under D. H. Hill were using as a ready-made trench. Union assaults broke against that lane for hours before finally forcing their way through.
It came to be remembered simply as Bloody Lane. Further south, Ambrose Burnside’s Union corps spent most of the day trying to force its way across a narrow stone bridge over Antietam Creek, held against it for hours by a small detachment of Confederate riflemen posted on the bluff above. When Burnside’s men finally crossed in the early afternoon, the Confederate right flank briefly stood in real danger of giving way altogether. It held because A.
P. Hill’s division, which two days earlier had still been at Harpers Ferry processing the garrison’s surrender, reached the field after a forced march of some seventeen miles and struck Burnside’s exposed flank. Among the brigade commanders who arrived with Hill that afternoon was Lawrence Branch, killed by a federal sharpshooter a short time later. Branch was one of six general officers on both sides who did not survive that day.
Joseph Mansfield, Israel Richardson, and Isaac Rodman fell commanding Union troops. Branch, William Starke, and George Anderson fell leading Confederate ones. The total for that single day of fighting was 22,717 men killed, wounded, or missing, counted on both sides together inside about twelve hours. Somewhere inside that count was Corporal Barton Mitchell, the soldier who had picked up the envelope out of a Frederick clover field four days earlier.
He was wounded at Antietam, shot in the leg. The wound left him with a chronic infection that never fully cleared, and by 1864 the army discharged him because of it. He died in 1868 at the age of fifty-two. It was not until 1890 that his widow was granted a government pension.
Lee did not withdraw the following morning. He held his position through September 18, using the pause to bring up stragglers and gather what remained of his scattered units. Only on the night of September 19, moving into the 20th, did the army finally cross back into Virginia at a ford near Shepherdstown. Even that withdrawal came with fighting attached.
When Union troops pushed across the ford in pursuit, A. P. Hill’s division turned and drove them back across the river. Historians have offered several explanations for why Lee stood and fought at Sharpsburg.
One line of argument, advanced by historians such as Alan Nolan and Thomas Connelly, describes an aggressive temperament in Lee, a habit of choosing the bold option because the two previous bold options had worked. A second explanation looks outward: the Confederacy still hoped that a clear victory on northern soil might move Britain or France toward recognizing it as an independent nation, and Confederate leadership was watching the northern elections coming that November. Lee’s own letters from the period describe exactly this kind of political calculation behind the invasion. A third explanation, that the injuries to Lee’s hands affected his judgment, is the weakest of the three, and the evidence for it has never been established.
Ten months later, at Gettysburg, the pattern reappeared in something close to a mirror image. At Antietam, the problem had been that the enemy knew Lee’s plan in full. At Gettysburg, it was the opposite: Lee’s cavalry under Jeb Stuart had ridden off on a raid that left the army with almost no reliable information about where the Union Army actually was. On the third day, with that blindness still largely unresolved, Lee ordered a frontal assault across open ground against the center of the Union line, an attack that became known as Pickett’s Charge.
Confederate casualties from that single assault ran to roughly 6,555 men killed, wounded, or captured out of a force of some 12,000. This time there is a documented objection on the record. Longstreet argued against the attack beforehand and left a written account of having done so. Lee overruled him and gave the order anyway.
According to soldiers who were present and later wrote about it, Lee rode among his retreating troops that same evening and told them that the fault for what had happened was entirely his own. It was only decades afterward, once Lee was dead, that former Confederate General Jubal Early and other defenders of what came to be called the Lost Cause began shifting that same blame onto Longstreet, protecting Lee’s reputation at the cost of Lee’s own stated words. The comfortable version of the Antietam decision was set down in print in 1934, when Douglas Southall Freeman published his Pulitzer-winning biography of Lee. In Freeman’s telling, the decision to stand at Sharpsburg read as cool, deliberate resolve.
Beginning with Stephen Sears in 1983 and taken further by Joseph Harsh in 1999, historians started asking whether standing and fighting had actually been a risk Lee could defend on its merits, or whether it had simply worked out well enough given how little McClellan did with the advantage he held. Between them, the comfortable 1934 version stopped being the only version on offer. The phrase from the opening of this account, the bloodiest day in American history, was true the first time it was said, and it is still true now. It is no longer a fact recited the way a textbook recites it, disconnected from any particular person’s choices.
It is the bill for one specific habit, run up by one specific commander on one specific afternoon along one specific creek. It was a culture in which every victory came due again almost immediately, converted straight into an obligation to risk something bigger next time. There was no mechanism in it for banking a win. Success bought nothing but the right to gamble again.
Four days before the guns opened at Sharpsburg, Stonewall Jackson had ridden into a Harpers Ferry that had just surrendered, past long columns of Union prisoners lining the road. Jackson had eight months left to live.