At 4:35 in the morning of May 12, 1864, twenty thousand Union soldiers moved forward through rain and fog so thick that men ten yards apart could not see one another. There were no drums, no bugle calls. Officers had passed the order in whispers: absolute silence until the column reached the Confederate earthworks. Winfield Scott Hancock, commanding the Union Second Corps, had drilled the plan into his men.
Speed, mass, and a human wave that would crash over the Confederate line before the men inside it could organize a defense. The target was a bulge in Robert E. Lee’s defensive line at Spotsylvania Courthouse, Virginia. Confederate engineers had built the position around a rise in the ground that offered excellent fields of fire, but the shape of the line was a vulnerability.
A salient, jutting outward nearly a mile into no man’s land, exposed its defenders to converging fire from three sides. The men inside it could not concentrate their fire across the nose of the arc. General Edward Johnson, whose division held the position, reportedly called it a slaughter pen and wanted the line straightened. Lee overruled him, believing the commanding ground was worth the risk.
The men who would have to hold it gave the ground a nickname: the Mule Shoe. For days, the Army of the Potomac had been probing Lee’s lines, and every attempt had failed at heavy cost. Then, on May 10, a young colonel named Emory Upton led a handpicked assault column of roughly four thousand men against the western face of the Mule Shoe. Instead of a broad advance in line formation, Upton massed his men in a dense column and ordered them to run, no stopping to reload, no pausing under fire.
The attack punched through the Confederate works, captured nearly a thousand prisoners, and collapsed when supporting troops failed to arrive in time. But Grant had seen enough. He ordered Hancock to replicate the same tactic at twice the scale. The full Second Corps would assault before dawn, in silence, directly into the nose of the salient.
Hancock spent May 11 positioning his corps, moving units under cover of darkness, guided by staff officers who had scouted the approach routes. The men were told almost nothing. On the Confederate side, however, a more consequential sequence of events was unfolding. For days, Confederate signal stations had tracked Union movements, and on May 11 they reported what appeared to be a withdrawal.
Wagon trains were moving, artillery was repositioning, infantry columns seemed to be shifting away from the front. The assessment, which Lee and his staff accepted, was that Grant was pulling back from Spotsylvania to shift the army east toward Fredericksburg. It was a reasonable conclusion drawn from faulty intelligence. Previous Union commanders in Virginia had done exactly that whenever they stalled against Confederate defenses.
Based on this assumption, Lee ordered the artillery supporting the Mule Shoe, roughly thirty cannon that had been dug into the salient, to be pulled out of the works and moved to the rear in preparation for a pursuing march. The guns left the salient on the evening of May 11. What the Confederate signal stations had actually observed was Hancock’s corps repositioning for the assault. The wagon trains were supply convoys.
The artillery movement was part of the Union concentration. By the time the error was discovered, the guns were gone, and Johnson’s division, between five and six thousand men, spent the night in the Mule Shoe with no artillery and no warning of what was coming. At 4:35 a. m.
, Hancock’s column began its approach. The Union soldiers came forward in a packed formation, brigade behind brigade, the same configuration Upton had used two nights earlier. The fog and rain swallowed the sound of their movement and hid the advancing mass from Confederate pickets until the column was nearly on top of the outer works. When the lookouts finally detected movement and fired their muskets, there was no time to organize a coherent defense.
The Union men broke into a run, cleared the outer earthworks in seconds, and hit the main trench line with overwhelming force. For a few minutes there was savage close-range fighting at the parapet, men firing across a wall of dirt, officers going over the top with swords, soldiers using rifles as clubs when there was no time to reload. Then the line broke. Johnson’s division collapsed in a matter of minutes.
The men holding the nose of the salient were surrounded before most understood what was happening. Three Confederate generals were captured in the initial breakthrough, including Edward Johnson himself, taken by a Union officer in the fog and confusion. Estimates of prisoners taken range from three to four thousand men. Entire regiments ceased to exist as fighting units.
For roughly an hour, it appeared the Army of the Potomac had cracked the Army of Northern Virginia wide open. But a breakthrough and a victory are not the same thing, and the difference is measured in minutes. The terrain inside the Mule Shoe worked against rapid exploitation. The same earthworks built to protect the Confederate defenders now channeled the attacking Union troops into narrow corridors and broke up their formations.
Units became mixed together in the fog. Officers lost track of their commands. Momentum slowed as men pushed forward into unfamiliar ground, fighting through a maze of trenches without maps and with no clear view of what lay ahead. Lee reacted with characteristic speed.
Reserves were rushed toward the base of the salient. Cadmus Wilcox’s division committed at a run. Engineers were directed to begin constructing a new line of earthworks straight across the base of the arc, a secondary defense if the Mule Shoe could not be held. Lee himself rode toward the fighting, and soldiers who saw him moving toward the front turned and ran back toward the enemy rather than let their commander expose himself.
Confederate troops stopped the Union exploitation, absorbed the pressure, and began a desperate holding action at a section of the works that came to be known as the Bloody Angle. For the next eighteen to twenty hours, the fighting concentrated at that single point. The earthworks there were roughly eight feet thick at the base, and the fighting happened at a distance measured in inches. Union troops clawed to the top of the parapet and fired down into the Confederate trench.
Confederate soldiers pressed up from below and fired back. Men loaded muskets and passed them forward so the men at the wall never stopped shooting. Rifles were thrust through gaps in the head logs and fired blindly. Bayonets were used less as weapons than as grappling tools, soldiers grabbing at enemy rifles through gaps in the logs and fighting for control of them.
Artillery was brought to point-blank range and fired directly into the works. The oak trees near the angle were chewed down by the sheer volume of rifle fire. Massive trunks toppled across the breastworks in the later hours of the fight. By late evening, Confederate engineers had completed the new line across the base of the salient.
Under the cover of darkness and the noise of the fighting, Lee withdrew the survivors of Johnson’s division from the works they had held all day. When Union troops pressed forward in the early hours of May 13, expecting more resistance, they found empty earthworks. The Confederates had abandoned the entire Mule Shoe and consolidated behind the new line. The losses on both sides were staggering.
Union casualties on May 12 ran somewhere between six and seven thousand men. Confederate losses, including the prisoners taken in the initial breakthrough, were roughly equivalent, possibly higher. Johnson’s division, one of the finest fighting formations in the Army of Northern Virginia, had effectively ceased to exist as an organized unit. The artillery that had been pulled from the salient the previous night was recovered, but the men who had operated those guns were mostly in Union prison camps.
Grant had not won the battle in any traditional sense. He had not broken Lee’s army or forced it from the field. But he had done something no Union commander had managed in three years of fighting in Virginia. He had inflicted on the Army of Northern Virginia a wound from which it did not fully recover.
The loss of an entire division, the capture of two general officers, the destruction of irreplaceable experienced veterans, these were not losses Lee could absorb indefinitely. The Confederates could rebuild earthworks. They could not rebuild Johnson’s division. The Overland Campaign continued for another month before Grant crossed the James River and settled into the siege lines at Petersburg.
Cold Harbor followed with its ghastly Union losses. The battles of the spring and summer of 1864 blurred together in northern newspapers, and the resolve of the northern public became the central question of the war. Grant faced calls to resign and accusations of butchery. He declined to stop.
Spotsylvania on May 12 functioned as a tactical draw that became a strategic success. Grant had demonstrated that the Army of the Potomac could crack Lee’s defenses, capture thousands of veterans, and absorb the counterattack that followed without retreating. He had done so at a cost that was terrible in human terms and acceptable in strategic terms. If one accepted Grant’s logic, the logic of a man who understood that the Confederacy had fewer men to lose and that the arithmetic would eventually end the war.
For Lee, the failure on the morning of May 12 was not an error of courage or a large error of strategy. His men were veterans who had stopped the Army of the Potomac in far more desperate situations. The works at the Mule Shoe were formidable by any engineering standard. What unraveled them was an error of interpretation.
Signal officers misread what they saw. Lee drew a reasonable conclusion from faulty intelligence. And the guns left the salient the night before the assault. Remove those thirty cannon from the Mule Shoe, and the men of Johnson’s division had nothing to blunt the momentum of twenty thousand soldiers running out of the fog.
Had the guns remained in position, they would have torn the Union columns apart before they reached the works. The attack might still have gone forward. It would not have gone forward the same way. One intelligence error on the evening of May 11 shaped the entire month of May 1864, altered the losses both armies carried into the summer, and contributed to the Confederate Army’s eventual inability to hold Petersburg.
Hancock’s men had done what Upton proved possible two nights earlier. They had run at the problem rather than walking into it. The fog and rain had helped. The removal of the artillery had been decisive.
But the nerve required to amass twenty thousand men in the dark and send them running toward prepared Confederate earthworks, that was Hancock’s contribution. By May 1864, he was fighting in chronic pain, his Gettysburg wound periodically reopening, and he did not tell Grant. He simply commanded. The morning of May 12 was the high point of his career, the moment when everything his corps was capable of was expressed in a single dawn assault that shattered one of the best prepared defensive positions the Army of Northern Virginia had ever constructed.
He never had another morning like it. By the time the Petersburg siege settled into its winter routines, Hancock was struggling to stay in the saddle. Eventually, he left field command and never held it again. Confederate survivors of the Mule Shoe described the moment the Union line appeared out of the fog as a wall of men emerging from nothing.
Union veterans of the Bloody Angle described the musketry as so continuous it ceased to be individual sounds and became a single sustained note. They were not describing a victory. Grant had not won the field, and Lee had not been destroyed. The war would go on for nearly another year.
But they were describing a morning when twenty thousand men ran into prepared defenses and came out the other side. The Army of Northern Virginia remained intact, but diminished in a way that mattered, in the way that running out of irreplaceable veterans in the fourth year of a war that was running out of time always matters. Grant filed his reports, counted his casualties, assessed what had been achieved, and ordered the army to keep moving south.