The Battle of Champion Hill (aka Champion's Hill) of May 16, 1863, was the pivotal battle in the Vicksburg campaign of the American Civil War (1861–1865). Union Army commander Major General Ulysses S. Grant and the Army of the Tennessee pursued the retreating Confederate States Army under Lieutenant General John C. Pemberton and defeated it twenty miles to the east of Vicksburg, Mississippi, leading inevitably to the Siege of Vicksburg and surrender. The battle is also known as Baker's Creek.

Sidney S. Champion, born in Guilford County, North Carolina, in 1824, came to Mississippi and settled on a large tract of land located between Bolton and Edwards. Captain Champion was a seasoned Confederate soldier long before the outbreak of the Battle of Champion Hill. The night of May 15 found Captain Champion within range of the battle site and serving as a vital member of General Pemberton's staff.

Following the Union occupation of Jackson, Mississippi, on May 14, both Confederate and Union forces made plans for future operations. General Joseph E. Johnston, commanding all Confederate forces in Mississippi, retreated with most of his army up the Canton Road. However, he ordered Lieutenant General John C. Pemberton, commanding three divisions totaling about 23,000 men, to leave Edwards Station and attack the Union troops at Clinton. Pemberton and his generals felt that Johnston's plan was likely to result in disaster and decided instead to attack the Union supply trains moving from Grand Gulf to Raymond. On May 16, however, Pemberton received another message from Johnston repeating his former orders. Pemberton had already started after the supply trains and was on the Raymond-Edwards Road, with his rear at a crossroads one-third mile south of the crest of Champion Hill. When he obediently ordered a countermarch, his rear, including his supply wagons, had become the vanguard of his attack.

At around 7:00 am on May 16, Union forces engaged the Confederates and the Battle of Champion Hill began. Pemberton's force formed into a three-mile (5 km)-long defensive line that ran southwest to northeast along a crest of a ridge overlooking Jackson Creek. Grant wrote in his Personal Memoirs, "... where Pemberton had chosen his position to receive us, whether taken by accident or design, was well selected. It is one of the highest points in that section, and commanded all the ground in the range."

Pemberton was unaware that one of the three Union columns was moving along the Jackson Road against his unprotected left flank on Champion Hill. Pemberton posted Brigadier General Stephen D. Lee's Alabama brigade on Champion Hill where they could watch for a Union column reportedly moving on the crossroads. Lee soon spotted the Union troops and they in turn saw him. If the enemy force was not stopped, it would cut the Confederates off from their Vicksburg base. Pemberton was warned of the Union movement and sent troops to defend his left flank. Union forces at the Champion House moved into action and their artillery began firing.

When Grant arrived at Champion Hill at about 10:00 a.m., he ordered an attack to begin. John A. McClernand's corps weakly attacked on the left and James B. McPherson's aggressively on the right. William T. Sherman's corps was well behind the others, departing from Jackson. By 11:30 a.m., the Union forces had reached the Confederate's main line. At 1:00 p.m., they took the crest, the troops from Carter L. Stevenson's division retiring in disorder. McPherson's corps swept forward, capturing the crossroads and closing the Jackson Road escape route. The division of John S. Bowen counterattacked in support of Stevenson, pushing the Union troops back beyond the Champion Hill crest before their surge was halted. However, they were too few to hold the position. Pemberton directed William W. Loring to send forces from the southern area of the line, where they were only lightly engaged with McClernand's ineffective attack, to reinforce the hill. However, Loring refused to budge, citing a strong Union presence to his front.

Grant now counterattacked, committing his forces that had just arrived from Clinton by way of Bolton. Pemberton's men could not resist this assault, and he ordered them to use the one escape route still open, the Raymond Road crossing of Bakers Creek. By now, Loring had decided to obey Pemberton's order and was marching toward the fighting by a circuitous route that kept them out of action. Brigadier General Lloyd Tilghman's brigade formed the rearguard and held at all costs, including the death of Tilghman, killed by artillery fire. Late in the afternoon, Grant's troops seized the Bakers Creek Bridge, and by midnight they had occupied Edwards. The Confederates fell back to a defensive position at the Big Black River in front of Vicksburg. The Battle of Big Black River Bridge the next day would be the final chance for Pemberton to escape.

Champion Hill was a bloody and decisive Union victory. In his Personal Memoirs, Grant observed, "While a battle is raging, one can see his enemy mowed down by the thousand, or the ten thousand, with great composure; but after the battle these scenes are distressing, and one is naturally disposed to alleviate the sufferings of an enemy as a friend."