[1] With the Army of the Tennessee besieging Vicksburg, Maj. Gen. Ulysses S. Grant gathered reinforcements from the surrounding areas.

The Left Wing was led by Maj. Gen. Grenville Dodge and participated in Maj. Gen. William T. Sherman's Atlanta Campaign.

These divisions fought notably at the Battle of Atlanta on July 22, 1864, holding off Confederate General John Bell Hood's flank attack.

Gen. Thomas E. G. Ransom was transferred from XVI Corps garrison duty at Corinth, Mississippi to take command of the Left Wing.

Under Ransom were the divisions led by John M. Corse (after Sweeney's court-martial) and Fuller which were significantly engaged at the Battle of Jonesborough.

The remaining division which did not join Sherman's Atlanta Campaign were left to guard the Mississippi River valley.

Maj. Gen. Hurlbut assumed direct command over these divisions known as the Right Wing and participated in the Meridian Expedition in February 1864.

During the Red River Campaign the Right Wing was attached to Maj. Gen. Nathaniel P. Banks' Army of the Gulf with Andrew J. Smith in command.

Smith took the rest of the Right Wing into Mississippi to protect Sherman's supply lines during the Atlanta Campaign, defeating the Confederates at the Battle of Tupelo.

At Nashville Smith had three divisions being commanded respectively by John McArthur, Kenner Garrard and Col. Jonathan B. Moore.