The Mississippi River moved past the bluffs at Vicksburg with the indifference that only great rivers have, carrying three million cubic feet of water every second while armies massed on its banks. For the first two years of the Civil War, this river was less a boundary than a wound. Whoever controlled the stretch between Memphis and the Gulf held the spine of the continent, its commerce, its harvests, its capacity to move armies from one half of itself to another. In the spring of 1863, one city stood between the Union and that control.
Vicksburg, Mississippi, was a town of eight thousand souls perched on a two-hundred-foot limestone bluff, its artillery stacked in tiers against the hillside, its guns trained on everything that dared pass below. Jefferson Davis called it the nail holding the two halves of the Confederacy together. Abraham Lincoln called it the key. Both men knew that whoever lost this argument would lose something irrecoverable.
By May of 1863, Ulysses Grant had been trying to take that city for six months. He had tried flooding the bayous north of it and floating gunboats through interior waterways. He had tried digging a canal across a river bend to route Union traffic around the batteries. He had pushed four separate expeditions through the Yazoo Delta, that waterlogged wilderness of cypress swamp and Spanish moss, and watched each one dissolve under impossible terrain and Confederate resistance.
His critics in Washington multiplied, editors printed his professional obituary, and there were whispers about his drinking and his fitness to command. A senator from Ohio, backed by two of Grant’s own subordinates, lobbied Lincoln directly to remove him. Lincoln refused. He had studied his list of available generals, and Grant was the one who kept moving.
I can’t spare this man, Lincoln reportedly said. He fights. What Grant prepared that late winter was unlike anything the Western theater had yet seen. It violated every conventional principle of military logistics.
His army would sever its own supply line, move deep into hostile territory with only what it could carry or take from the countryside, and fight through the heart of Mississippi before the Confederates could concentrate enough force to stop it. When he shared the plan with Sherman, his most trusted subordinate, Sherman drafted a memorandum urging him in the strongest terms to stop. Grant read it, filed it, and gave the order to move. The crossing that made everything possible came on the night of April 16, 1863.
Admiral David Porter ran his fleet of gunboats and transports south past Vicksburg under darkness, hugging the Louisiana shore. The Confederates anticipated this and were ready. They lit enormous bonfires on the western bank to illuminate the river, and the batteries opened up at close range. Grant watched from a deck nearby with his wife Julia and their children, who by some accounts mistook the artillery flashes for fireworks.
For two and a half hours, the river above Vicksburg became something between a naval battle and a spectacle, shells hissing into the water, the burning hulks of two Union transports drifting south like slow lanterns. When Porter’s fleet emerged below the city, twelve of thirteen vessels were intact. Grant had his crossing. He marched his army south through Louisiana, crossed the Mississippi at Bruinsburg on April 30 in the largest American amphibious operation before the Second World War, and stepped onto Mississippi soil with no supply line behind him and no serious intention of establishing one.
His plan was speed. Move fast enough to deny the Confederates the ability to concentrate, live off the country, beat Pemberton’s forces in the field before they could retreat into Vicksburg’s fortifications, and take the city from the rear. His men carried three days of rations in their haversacks. They would not be resupplied for seventeen days.
Waiting on the other side was Lieutenant General John C. Pemberton, and his situation carried the kind of irony the Civil War manufactured with consistent cruelty. He was born in Philadelphia, attended West Point, and served in the Mexican War alongside men who now attacked him. He married a Virginia woman, and when the war began he chose the Confederacy, a decision that cost him his family’s respect in the North and never fully purchased its equivalent in the South.
His soldiers doubted him for where he was born. His superiors in Richmond doubted him because he was methodical in a war that demanded instinct. His theater commander, General Joseph Johnston, arrived in mid-May and told him to abandon Vicksburg and save the army. Jefferson Davis, whose own plantation sat nine miles south of the city, told him to hold at all costs.
Between these two irreconcilable orders, Pemberton attempted to satisfy both and execute neither with conviction. Meanwhile Grant was moving inland. He struck Confederate forces at Port Gibson on May 1, forty miles south of Vicksburg, in terrain unlike anything his soldiers expected. This was not the open farmland of the upper Mississippi Valley.
The ground was a chaos of loess ridges, soft silty bluffs cut apart by ravines so deep and densely vegetated they were passable only along their floors. Visibility dropped to twenty yards in places, regiments lost contact in the undergrowth and fired at the sound of voices. Grant’s advantage was simply numbers, and he ground through the terrain on that alone. By nightfall the road north was open.
At Raymond on May 12, a Confederate brigade under Brigadier General John Gregg attacked Grant’s lead division, badly underestimating what it faced. The resulting collision in the creek bottoms was close and furious. Gregg’s men eventually broke and fell back north, but the fight told Grant something he already suspected. Whatever their officers’ difficulties, the Confederate soldiers in Mississippi intended to fight.
Raymond placed Grant within striking distance of Jackson, the state capital and principal rail hub supplying Confederate forces. He turned east, and on May 14, in a cold rain, Sherman and McPherson struck Jackson from two directions. Johnston, inside the city with a small force, assessed the arithmetic and evacuated north. Grant’s men spent the rest of that rainy day destroying the infrastructure of the Confederate supply system, tearing up railroad track, burning warehouses, wrecking the telegraph lines.
Then Grant turned west again. The collision came three days later at a place called Champion Hill, and it was the campaign’s fulcrum. Pemberton had positioned roughly twenty-two thousand men across the ridge system east of Vicksburg, on defensible ground. The ridges were steep, the roads few.
What Pemberton lacked was not ground but certainty about Grant’s intentions and the command arrangements to respond once they became apparent. On May 16, the battle lasted nine hours. Grant attacked with everything, his core forward in a rolling pressure that forced Pemberton to commit reserves faster than he could move them. In the early afternoon, a Union division under Alvin Hovey broke through the Confederate center on the crest of Champion Hill, and for a time the entire Confederate army was in danger of being cut in half.
Pemberton scraped together a counterattack that briefly retook the hill, but by late afternoon the weight of Grant’s numbers made the position untenable. The retreat collapsed into something close to a rout. Pemberton lost nearly four thousand men and fell back toward Vicksburg. The final confrontation before the city came the next morning at a bridge over the Big Black River.
The Confederate rearguard dug in behind rifle pits and a shallow bayou. A Union brigade under Michael Lawler, a three-hundred-pound Illinois farmer who had served in two previous wars, saw a gap and charged before anyone had ordered him to. The Confederate line dissolved in eighteen minutes. Pemberton burned the bridge behind his survivors and fell back to Vicksburg.
Union engineers had a new crossing built by the following morning. On May 18, the first Union soldiers climbed the ridgelines east of Vicksburg and looked at what they had been marching toward for eighteen days. Nine miles of fortifications encircled the city’s landward approaches, a connected system of forts, redoubts, lunettes, and rifle pits with artillery covering every ravine an attacker might use. In any set piece assault on prepared works, the arithmetic overwhelmingly favored the defenders.
Grant ordered an assault anyway on May 19, half convinced Pemberton’s men were too broken to resist. He was wrong. The assault was repulsed with rapid efficiency, and Grant lost close to a thousand men. Three days later he ordered a full-scale coordinated assault along the entire line.
He had reasons. Halleck had suggested part of his army might be redirected to Louisiana, and he wanted the city taken before that became necessary. He also believed a simultaneous attack across nine miles of front would eventually find a soft spot. The assault lasted most of the day.
Individual acts of extraordinary courage produced nothing strategically useful. At the railroad redoubt, men from the 13th Corps reached the exterior slope and held a corner of the fortification for over two hours, fighting from outside a wall while the Confederates fought from inside. At the second Texas lunette, Iowa volunteers planted their regimental colors in the ditch wall; the men who planted them were shot, and more men came up to plant them again, and those men were shot too. The flags remained there through the afternoon.
Grant’s casualties exceeded three thousand, and he did not take the city. He settled in instead. With the Navy holding a line through Grand Gulf, he moved his base to the Yazoo River north of Vicksburg, drew his siege lines, and waited. The logic was simple.
He had seventy thousand men, a supply line, and time. Pemberton had thirty thousand, none of those, and a clock running against him with every meal his soldiers ate. The siege work was neither simple nor quick. Union engineers directed the digging of approach trenches in the pattern European siege warfare had refined over centuries, parallel trenches connected by zigzag saps that approached at oblique angles so Confederate guns could not fire down their length.
Soldiers learned to fill gabions with dirt and push sap rollers ahead of the digging parties to absorb enemy fire. The work went on by day and night, in heat that reached the nineties. Every morning the Confederate fortifications were a few yards closer than they had been the evening before. The Confederates pushed back with counter approaches and night raids.
Snipers and mortars produced a daily attrition that altered nothing fundamental. In places the lines were close enough that men heard each other talking, and informal truces developed, intervals during which tobacco and newspapers changed hands across ground that was otherwise strictly lethal. Then the intervals ended and they resumed trying to kill each other. Inside the city, civilians had been adapting since March.
By late May, much of Vicksburg’s population had abandoned their homes for caves cut into the hillsides, shelters ranging from simple holes to elaborate warrens with carpeted floors and oil lamps on clay ledges. A woman named Emma Balfour recorded the siege in her diary with composure, noting the specific sounds of Union mortar rounds, the social arrangements of cave society, and, with increasing frequency as the weeks passed, the food. Food became the defining reality. Pemberton had entered Vicksburg with roughly a month’s rations and immediately placed the army on reduced portions.
By mid-June, a soldier received about four ounces of bacon and a quarter pound of cornbread a day. Then less. Mule meat entered the diet. Rats were sold at market stalls at prices that made clear they were not food for the desperate but food for anyone who could afford them.
By late June, surgeons noted that wounds were not healing. The bodies they worked on had consumed their reserves. The men in the works could still load and fire from fixed positions propped against the earthworks if they had support. What they could not do by early July was anything requiring sustained movement.
Joseph Johnston’s army of relief, gathering northeast of Vicksburg, had reached roughly thirty thousand men. The theoretical plan, Johnston striking Grant from the rear while Pemberton sallied from the city, had the shape of military sense and none of its substance. Grant had been reinforced throughout June and could maintain the siege and hold a blocking force simultaneously. Sherman commanded that force and positioned it well.
Johnston looked at Sherman’s position and made the decision that defined his career. He would not advance. His messages to Pemberton were models of strategic evasion, hedging suggestions with conditions, withdrawing conditions when pressed for clarity, finally asking Pemberton to decide for himself whether a sortie was practicable. The army meant to save Vicksburg spent July at a careful distance from it.
The surrender came in stages. On July 1, Pemberton asked his commanders whether the army could break out. They told him their soldiers were too weak to sustain a march under fire. They could hold the earthworks for a time, but they could not make the mobile night attack a breakout required.
Pemberton heard this from man after man, thanked them, and dismissed them. On July 3, the same afternoon the survivors of Pickett’s division were walking back across the fields at Gettysburg, Pemberton sent a note through the lines requesting terms. Grant’s initial answer was unconditional and immediate surrender. Then he sat with it for a few hours and revised his position.
The problem was practical. He had thirty thousand prisoners to process, and Union infrastructure in Mississippi could not move that many men in any reasonable timeline. He offered parole instead. The Confederate soldiers would be released on their word of honor not to fight until formally exchanged.
Grant had opposed parole throughout the war, believing Confederate soldiers violated it. He offered it anyway. Paroled men walking home through the South were evidence, thin and empty-handed, and the people who saw them would draw their own conclusions. The symbolic weight of thirty thousand men walking away from Vicksburg under parole was precisely the weight Grant intended.
At ten in the morning on July 4, 1863, the white flags went up along the Confederate works. Grant rode into Vicksburg on a chestnut horse. The Confederate soldiers came out and stacked their arms in long rows along the roads. The Union men who had spent forty-seven days in the opposing trenches watched them emerge in silence, not a triumphant silence but something more considered.
Union soldiers passed food across before the formal ceremonies were complete. The date was not accidental. Grant had shaped the final negotiations at least partly to produce a surrender on the Fourth of July. News arrived in Washington on July 7, the same day Lincoln was still processing the dimensions of Gettysburg.
The combination of those two victories produced a political and psychological impact no single event could have generated alone.