Battle of the American Civil War, 1863
The Battle of Missionary Ridge, also known as the Battle of Chattanooga, was fought on November 25, 1863, as part of the Chattanooga campaign of the American Civil War. Following the Union victory in the Battle of Lookout Mountain on November 24, Union forces in the Military Division of the Mississippi under Maj. Gen. Ulysses S. Grant assaulted Missionary Ridge and defeated the Confederate Army of Tennessee, commanded by Gen. Braxton Bragg, forcing it to retreat to Georgia.
In the morning, Maj. Gen. William Tecumseh Sherman, commanding the Union Army of the Tennessee, made piecemeal attacks to capture the northern end of Missionary Ridge, Tunnel Hill, but were stopped by fierce resistance from the Confederate divisions of Maj. Gen. Patrick Cleburne, William H.T. Walker, and Carter L. Stevenson. In the afternoon, Grant was concerned that Bragg was reinforcing his right flank at Sherman's expense. He ordered the Army of the Cumberland, commanded by Maj. Gen. George Henry Thomas, to move forward and seize the Confederate line of rifle pits on the valley floor and stop there, as a demonstration to assist Sherman's efforts. The Union soldiers moved forward and quickly pushed the Confederates from the first line of rifle pits, but were then subjected to a punishing fire from the Confederate lines up the ridge.
After a short pause to regain their breath, the Union soldiers continued the attack against the remaining lines further up the ridge, found that the defenders' remaining rifle pits were untenable and pursued the fleeing Confederates. This second advance was taken up by the commanders on the spot and also by some of the soldiers. Seeing what was happening, Thomas and his subordinates sent orders confirming orders for the ascent. The Union advance was somewhat disorganized but effective, finally overwhelming and scattering what ought to have been, as General Grant himself believed, an impregnable Confederate line. The top line of Confederate rifle pits was sited on the actual crest rather than the military crest of the ridge, leaving blind spots for infantry and artillery. In combination with an advance from the southern end of the ridge by divisions under Maj. Gen. Joseph Hooker, the Union Army routed Bragg's army, which retreated to Dalton, Georgia, ending the siege of Union forces in Chattanooga, Tennessee.
Background.
Military situation.
After their disastrous defeat at the Battle of Chickamauga, the 40,000 men of the Union Army of the Cumberland under Maj. Gen. William Rosecrans retreated to Chattanooga. Confederate General Braxton Bragg's Army of Tennessee besieged the city, threatening to starve the Union forces into surrender. Bragg's troops established themselves on Missionary Ridge and Lookout Mountain, both of which had excellent views of the city, the Tennessee River flowing north of the city, and the Union supply lines.
Heavy rains began to fall in late September, washing away long stretches of the mountain roads. On October 1, Maj. Gen. Joseph Wheeler's Confederate cavalry intercepted and severely damaged a train of 800 wagons—burning hundreds of the wagons, and shooting or sabering hundreds of mules—at the start of his October 1863 raid through Tennessee to sever Rosecrans's supply line. Toward the end of October, typical Federal soldiers' rations were "four cakes of hard bread and a quarter pound of pork" every three days.
The Union Army sent reinforcements: Maj. Gen. Joseph Hooker with 15,000 men in two corps from the Army of the Potomac in Virginia and Maj. Gen. William Tecumseh Sherman with 20,000 men from Vicksburg, Mississippi. On October 17, Maj. Gen. Ulysses S. Grant received command of three Western armies, designated the Military Division of the Mississippi; he moved to reinforce Chattanooga and replaced Rosecrans with Maj. Gen. George Henry Thomas.
Thomas launched a surprise amphibious landing at Brown's Ferry on October 27 that opened the Tennessee River by linking up his Army of the Cumberland with Hooker's relief column southwest of the city, thus allowing supplies and reinforcements to flow into Chattanooga over what was called the "Cracker Line". In response, Bragg ordered Lt. Gen. James Longstreet to force the Federals out of Lookout Valley. The ensuing Battle of Wauhatchie (October 28–29) was one of the war's few battles fought exclusively at night.
Sherman arrived with his 20,000 men of the Army of the Tennessee in mid-November. Grant, Sherman, and Thomas planned a flanking attack on Bragg's force, with an assault by Sherman against the northern end of Missionary Ridge, supplemented by two of Thomas' divisions from the center. Hooker, instead of attempting to capture Lookout Mountain and then move across the Chattanooga Valley to the break in the ridge at Rossville, Georgia, was to do nothing besides forwarding troops toward the center.
Running behind schedule, Sherman's force was ready to cross the Tennessee River early on November 24. The day before, Grant ordered Thomas to advance halfway to Missionary Ridge on a reconnaissance in force to determine the strength of the Confederate line, hoping to ensure that Bragg would not withdraw his forces and move in the direction of Knoxville, Tennessee, where Maj. Gen. Ambrose Burnside was being threatened by a Confederate force under Lt. Gen. James Longstreet. Thomas sent over 14,000 men toward a minor hill named Orchard Knob, and overran the Confederate defenders. Grant changed his orders and instructed Thomas's men to dig in and hold the position.
Surprised by Thomas's move and realizing that his center and right might be more vulnerable than he had thought, Bragg quickly readjusted his strategy. Bragg assigned Col. Warren Grigsby's brigade of Kentucky cavalry to picket the Tennessee River northeast of Chattanooga and ordered Brig. Gen. Marcus Joseph Wright to bring his brigade of Tennessee infantry from Cleveland, Tennessee, by train to Chickamauga Station. He recalled all units he had recently ordered to Knoxville if they were within a day's march. Maj. Gen. Patrick Cleburne's division returned after dark from Chickamauga Station, interrupting the process of boarding the trains. Bragg began to reduce the strength on his left by withdrawing Maj. Gen. William H. T. Walker's division from the base of Lookout Mountain and placing them on the far right of Missionary Ridge, just south of Tunnel Hill. He assigned Lt. Gen. William J. Hardee to command his now critical right flank, turning over the left flank to Maj. Gen. Carter L. Stevenson. Bragg's concern for his right proved justified and his decisions were fortuitous. In the center, Maj. Gen. John C. Breckinridge ordered his men to begin fortifying the crest of Missionary Ridge, a task that Bragg had somehow neglected for weeks. Unable to decide whether to defend the base or the crest of the ridge, the divisions of Brig. Gens. William B. Bate and J. Patton Anderson were ordered to move half of their divisions to the crest, leaving the remainder in the rifle pits along the base. James L. McDonough wrote of the upper entrenchments, "Placed along the physical crest rather than what is termed the military crest ... these works severely handicapped the defenders."
November 24 was dark, with low clouds, fog, and drizzling rain. Sherman's force crossed the Tennessee River successfully in the morning, then took the set of hills at the north end of Missionary Ridge, although he was surprised to find that a valley separated him from the main part of the ridge. Alerted by Grigsby's cavalry that the enemy had crossed the river in force, Bragg sent Cleburne's division and Wright's brigade to challenge Sherman. After skirmishing with the Confederates, Sherman ordered his men to dig in on the hills he had seized. Cleburne, likewise, dug in around Tunnel Hill.
At the same time, Hooker's command succeeded in the Battle of Lookout Mountain and prepared to move east toward Bragg's left flank on Missionary Ridge. The divisions of Stevenson and Cheatham retreated behind Chattanooga Creek, burning the bridges behind them.
On the night of November 24, Bragg asked his two corps commanders whether to retreat or to stand and fight. Cleburne, concerned about what Sherman had accomplished, expected Bragg to retreat. Hardee also counseled retreat, but Breckinridge convinced Bragg to fight it out on the strong position of Missionary Ridge. Accordingly, the troops withdrawn from Lookout Mountain were ordered to the right wing to assist in repelling Sherman.
Opposing forces.
Union.
Grant's Military Division of the Mississippi assembled the following forces at Chattanooga:
Confederate.
Bragg's Army of Tennessee had the following forces available in Chattanooga:
On November 5, Bragg had seriously weakened his forces by sending Longstreet's Corps, commanded by Lt. Gen. James Longstreet, with the divisions of Maj. Gen. Lafayette McLaws and Brig. Gen. Micah Jenkins (Hood's Division), against Maj. Gen. Ambrose Burnside near Knoxville. On November 22, Bragg had further weakened his forces by ordering Buckner's division to reinforce Longstreet at Knoxville.
Battle.
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Sherman should have put in all his force to turn Bragg's right, instead of attacking the strongest place on the right, for Bragg had given to the right every man that he could safely spare.
 Brig. Gen. William F. "Baldy" Smith
On November 25, Grant's plan concentrated on the attack by Sherman against Bragg's right flank at Tunnel Hill. He gave a supporting role to Thomas:
 ;templatestyles src="Template:Blockquote/styles.css" / ;I have instructed Sherman to advance as soon as it is light in the morning, and your attack, which will be simultaneous, will be in cooperation. Your command will either carry the rifle pits and ridge directly in front of them or move to the left, as the presence of the enemy may require.
Grant had no particular expectation for Hooker other than to divert Bragg's attention by continued demonstrations on Lookout Mountain, which had been evacuated by the Confederates. However, Thomas wanted support on his flank and called Hooker to cross the valley and demonstrate against Bragg's left flank directly at the Rossville Gap.
Sherman at Tunnel Hill.
In a letter to his brother, Sherman wrote:
 ;templatestyles src="Template:Blockquote/styles.css" / ;The whole philosophy of the battle was that I should get, by a dash, a position on the extremity of the Missionary Ridge from which the enemy would be forced to drive me, or allow his depot at Chickamauga Station to be in danger. I expected Bragg to attack me at daylight, but he did not, and to bring matters to a crisis quickly, for the sake of Burnside in East Tennessee, Grant ordered me to assume the offensive.
Sherman had about 16,600 men in the three divisions of Brig. Gens. Morgan Lewis Smith, John E. Smith, and his foster brother and brother-in-law Hugh Boyle Ewing, and three regiments of Col. Adolphus Buschbeck's brigade from the XI Corps. Sherman also had Jefferson C. Davis's division guarding his rear. Around ten o'clock that morning, Grant dispatched the rest of Howard's XI corps from Thomas to Sherman. Hardee had about 9,000 Confederates in the divisions of Cleburne and Walker with another 4,000 soon to arrive in Stevenson's division. On Hardee's left, Benjamin F. Cheatham's decimated division occupied the ridge between Thomas' and Sherman's fronts. However, at dawn, when Sherman was supposed to attack, he was opposed by just three small brigades under Cleburne—about 4,000 men—and only the Texas brigade of Brig. Gen. James A. Smith was actually positioned on Tunnel Hill. But seemingly unnerved by his incorrect positioning, Sherman delayed until about 9:00 o'clock. He selected just two brigades from Ewing's division to attack. Brig. Gen. John M. Corse would approach from the north, Col. John M. Loomis from the northwest, across the open fields between the railroads.
Sherman ordered Corse's brigade, with a detachment from Joseph A.J. Lightburn's brigade, to attack along the narrow length of Tunnel Hill. Col. John M. Loomis's brigade, supported by Buschbeck, would move across the open fields on the west of the ridge while Brig. Gen. Giles Alexander Smith's brigade would move through the valley on the east side of the ridge. The brigades of Brig. Gen. Charles L. Matthies and Col. Green Berry Raum were held in reserve to follow up any successful attack; the brigades of Cols. Joseph R. Cockerill and Jesse I. Alexander would hold the heights seized the day before.
Corse drove off the Confederate skirmish line and seized some half-built defensive works at the north end of Tunnel Hill. Continuing over the crest of the hill, Corse charged Cleburne's main position but was repulsed. After several attempts, Sherman gave up on attacking from Corse's position and the fighting shifted to the west side of the