Union Army General-in-chief of the
Union Army Lieutenant General
Ulysses S. Grant ordered Sherman, "to move against Johnston's army, to break it up, and to get into the interior of the enemy's country as far as you can, inflicting all the damage you can against their war resources". Sherman commanded elements of three armies. The
Army of the Cumberland under Major General
George H. Thomas was made up of the
IV Corps led by Major General
Oliver Otis Howard, the
XIV Corps under Major General
John M. Palmer, the
XX Corps commanded by Major General
Joseph Hooker, and three cavalry divisions led by
Brigadier Generals
Edward M. McCook,
Kenner Garrard, and
Hugh Judson Kilpatrick. The
Army of the Tennessee led by Major General
James B. McPherson included the
XV Corps under Major General
John A. Logan, the Left Wing of the
XVI Corps under Major General
Grenville M. Dodge, and the
XVII Corps under Major General
Francis Preston Blair Jr. The
Army of the Ohio commanded by Major General
John Schofield consisted of the
XXIII Corps under Schofield and a cavalry division commanded by Major General
George Stoneman. Sherman began his campaign with almost 100,000 men, including Thomas' 60,000 and 130 guns, McPherson's 25,000 and 96 guns, and Schofield's 14,000 men and 28 guns. Through the fighting near
Dallas, Sherman lost 12,000 casualties, but was reinforced by the fresh XVII Corps at that time.
Confederate Army Johnston's
Army of Tennessee began the campaign with two infantry corps led by Lieutenant Generals
William J. Hardee and
John Bell Hood, and a cavalry corps under Major General
Joseph Wheeler. The army was soon reinforced from the Army of Mississippi by the corps of Lieutenant General
Leonidas Polk and the cavalry division of Brigadier General
William Hicks Jackson. Polk was killed at
Pine Mountain on June 14 and temporarily replaced by Major General
William Wing Loring. Hardee's corps included the divisions of Major Generals
William B. Bate,
Benjamin F. Cheatham,
Patrick Cleburne, and
William H. T. Walker. Hood's corps comprised the divisions of Major Generals
Thomas C. Hindman,
Carter L. Stevenson, and
Alexander P. Stewart. Polk's corps was made up of the divisions of Major Generals
Edward C. Walthall and
Samuel Gibbs French, and Brigadier General
Winfield S. Featherston. As recently as the
Battle of Cassville on May 19, the Confederate army had numbered 70,000–74,000 troops. Since then, Johnston's army sustained about 3,000 casualties in the fighting near Dallas.
Previous operations The Atlanta campaign began on May 7, 1864, when Sherman's forces began to advance. Sherman sent McPherson's army on a wide swing to the west while the armies under Thomas and Schofield pressed Johnston's defenses frontally. After the
Battle of Rocky Face Ridge, Johnston withdrew from the
Dalton position. The
Battle of Resaca occurred on May 13–16, after which Johnston retreated again. After a
skirmish at Adairsville, Johnston tried to set a trap for Sherman's forces, which were advancing on a broad front. At the
Battle of Cassville on May 19, Johnston's attempted counterstroke miscarried and the Confederate army withdrew the next day. Since the Confederate defenses at
Allatoona Pass were too strong, Sherman tried to turn Johnston's position by a wide sweep to the west. This resulted in a series of actions in late May known as the battles of
New Hope Church,
Pickett's Mill, and
Dallas. The Union forces then shifted to the east and finally forced Johnston to order another retreat. In mid-June, a series of actions took place near
Gilgal Church and
Pine Mountain, after which Johnston fell back to Kennesaw Mountain.
Kennesaw Kennesaw Mountain represented the key to the Confederate defenses. The railroad coming from the north veered to the northeast past Kennesaw's northern end, then turned south before reaching
Marietta. The mountain ridge runs northeast to southwest with three notable features. These are Big Kennesaw, which stands above the surrounding terrain at the northeast end, Little Kennesaw with its nearly summit, and Pigeon Hill with its height at the southwest end. From Big Kennesaw's dominating summit, any daytime movements by the Union forces could be immediately observed. Kennesaw Mountain was probably a stronger position than Rocky Face Ridge and Allatoona Pass. shows Kennesaw Mountain. Hood's corps held the Confederate right flank east of Kennesaw Mountain and north of Marietta. Loring's corps held the mountain in the center, with Featherston's division on the right, Walthall's division in the center, and French's division on the left. Hardee's corps held the left flank, with the divisions of Walker, Bate, Cleburne, and Cheatham deployed from right to left. Hardee's troops were posted behind Noses Creek, which was swollen from the recent heavy rains. In front of the main Confederate defenses was a fortified outpost line. The Confederate infantry defended a long front. Wheeler's cavalry guarded the right flank while Jackson's cavalry watched the left flank. On the morning of June 19, Sherman optimistically believed that the Confederates had withdrawn to the
Chattahoochie River, but by the day's end he realized that assessment was wrong. McPherson's three corps formed the Federal left wing, with Blair's corps on the extreme left flank. Thomas' army advanced with Palmer's corps on the left, Howard's corps in the center, and Hooker's corps on the right. On the Union right wing, Schofield's corps marched southeast along the Sandtown Road. There was a vigorous cavalry clash on the left between Garrard's division and Wheeler. Hooker was able to cross Noses Creek at a place where the stream curved to the west, and established his corps on the east side of the creek. Schofield reached the place where the road from Powder Springs Church to Marietta spanned Noses Creek, but did not attempt to cross. Federal cannons took Pigeon Hill under fire, inflicting 35 casualties on French's Missouri brigade, including its commander Brigadier General
Francis Cockrell. French responded by having his gun crews drag their cannons up Pigeon Hill. On June 20, Sherman began extending his right wing toward the south. Howard ordered Brigadier General
Thomas J. Wood's division and a brigade from Major General
David S. Stanley's division to replace the left flank of Hooker's corps. Brigadier General
Alpheus S. Williams's division on Hooker's left shifted to the right flank of the corps. Later, Stanley's other brigades were able to cross to the west bank of Noses Creek. They seized two hills and were counterattacked by Confederates who recaptured one of them. Stanley's division suffered 250 casualties in the fighting. Since it rained again that day, Sherman decided not to try any attacks until the weather cleared. Brigadier General
Jacob Dolson Cox's division of Schofield's corps made a successful crossing of Noses Creek and entrenched on the east side. The constant rain caused many sick soldiers in both Union and Confederate armies to be evacuated to the rear. == Battle ==