The Battle of Tupelo, also known as the Engagement at Harrisburg, was a battle of the American Civil War fought from July 14 to 15, 1864, near Tupelo, Mississippi. The Union victory over Confederate forces in northeast Mississippi ensured the safety of Sherman's supply lines during the Atlanta Campaign.
On the morning of the 14th, Smith took a strong position at Harrisburg and entrenched. Lee reacted by forming lines with Roddey's Brigade on the right, Mabry's Brigade on the left, and Crossland's Brigade in the middle. Bell's Brigade was put in the front line on Mabry's right. The troops were all dismounted. Both Chalmers' and Buford's divisions were held in reserve. The plan of attack seemed to be swing the right, but Lyon's Brigade became engaged first and was forced to fall back with heavy losses. Chalmers' Division, dismounted, was ordered forward and, after Mabry and Bell had been repulsed, Rucker's Brigade made an equally futile assault. The men were swept away by the fire of a superior and entrenched force, and many fell from exhaustion in the great heat of a July sun. A little after noon the Confederates fell back and entrenched, but were not molested by Union forces, who contented themselves with tearing up the railroad in the vicinity of Tupelo and burning the town of Harrisburg.
On the 15th, it appearing Smith would not attack, Buford made a demonstration on his left flank. Soon afterward Smith began his retreat, and a vigorous pursuit was at once begun. At Old Town Creek Buford came up with the Union in line of battle and was driven back in confusion. McCulloch's Brigade was ordered to attack, but being sent in by regiments was speedily repulsed. Here General Forrest and Colonel McCulloch were both severely wounded, and the command of the forces in front devolved upon Chalmers. Though the pursuit was continued, there was but slight skirmishing after this engagement.
Wikipedia
The Battle of Old Town Creek
At 2 p.m. on July 15, 1864, after skirmishing with Confederates on the western and southern fronts, the Federals began marching north in the direction of Memphis. They marched four miles and crossed to the north side of Old Town Creek and camped in the late afternoon. At 5 p.m., from a commanding ridge south of Old Town Creek, Confederate forces surprised Smith’s troops with artillery and infantry fire. The Federals scrambled and formed a line that pushed the Confederates off the ridge and forced them to retreat to Harrisburg. The fight at Old Town Creek ended the Battle of Tupelo. Among the casualties was Forrest himself, who was kept out of action for three weeks.