Something for the weekend. The Chattanooga Boy’s Choir singing The Battle Cry of Freedom. An appropriate selection as 150 years ago the battle of Chattanooga began which resulted in a complete Union victory. Actually three battles: Orchard Knob, November 23; Lookout Mountain, November 24; and Missionary Ridge, November 25; these engagements were the culmination of the Chattanooga campaign that began when Bragg and his Army of Tennessee, put the Army of the Cumberland under siege in Chattanooga in the aftermath of the Confederate victory at Chickamauga.
With strong Union reinforcements, and with Grant placed in overall command, the siege was effectively broken on October 28, 1863 with the Union establishing the “cracker line” to bring supplies into Chattanooga. With the lifting of the siege and with the Union forces opposing him growing ever stronger, Bragg made the strategic blunder of keeping his main force in place confronting Chattanooga and sent Longstreet’s Corps, 11,000 men, on an ultimately futile campaign to capture Knoxville.
Bragg doubled down on this error by ordering two divisions to withdraw from the lines around Chattanooga and march to the rail head to be transported to reinforce Longstreet on November 22. Seeing the movement of the Confederate forces, Grant decided to launch the long planned offensive against the Confederate positions around Chattanooga, partially to prevent Bragg from reinforcing Longstreet.
Grant ordered 14,000 Union soldiers to seize Orchard Knob, a position held by 600 Confederates in front of the main Confederate defensive lines along Missionary Ridge. The position was taken with light casualties, and it did cause Bragg to cancel the movement of one of the divisions he had intended to send to Longstreet.
Here is Grant’s description of the engagement in his Memoirs:
On the 22d, however, a deserter came in who informed me that Bragg was leaving our front, and on that day Buckner’s division was sent to reinforce Longstreet at Knoxville, and another division started to follow but was recalled. The object of Bragg’s letter, no doubt, was in some way to detain me until Knoxville could be captured, and his troops there be returned to Chattanooga.
During the night of the 21st the rest of the pontoon boats, completed, one hundred and sixteen in all, were carried up to and placed in North Chickamauga. The material for the roadway over these was deposited out of view of the enemy within a few hundred yards of the bank of the Tennessee, where the north end of the bridge was to rest.
Hearing nothing from Burnside, and hearing much of the distress in Washington on his account, I could no longer defer operations for his relief. I determined, therefore, to do on the 23d, with the Army of the Cumberland, what had been intended to be done on the 24th.
The position occupied by the Army of the Cumberland had been made very strong for defence during the months it had been besieged. The line was about a mile from the town, and extended from Citico Creek, a small stream running near the base of Missionary Ridge and emptying into the Tennessee about two miles below the mouth of the South Chickamauga, on the left, to Chattanooga Creek on the right. All commanding points on the line were well fortified and well equipped with artillery. The important elevations within the line had all been carefully fortified and supplied with a proper armament. Among the elevations so fortified was one to the east of the town, named Fort Wood. It owed its importance chiefly to the fact that it lay between the town and Missionary Ridge, where most of the strength of the enemy was. Fort Wood had in it twenty-two pieces of artillery, most of which would reach the nearer points of the enemy’s line. On the morning of the 23d Thomas, according to instructions, moved Granger’s corps of two divisions, Sheridan and T. J. Wood commanding, to the foot of Fort Wood, and formed them into line as if going on parade, Sheridan on the right, Wood to the left, extending to or near Citico Creek. Palmer, commanding the 14th corps, held that part of our line facing south and southwest. He supported Sheridan with one division (Baird’s), while his other division under Johnson remained in the trenches, under arms, ready to be moved to any point. Howard’s corps was moved in rear of the centre. The picket lines were within a few hundred yards of each other. At two o’clock in the afternoon all were ready to advance. By this time the clouds had lifted so that the enemy could see from his elevated position all that was going on. The signal for advance was given by a booming of cannon from Fort Wood and other points on the line. The rebel pickets were soon driven back upon the main guards, which occupied minor and detached heights between the main ridge and our lines. These too were carried before halting, and before the enemy had time to reinforce their advance guards. But it was not without loss on both sides. This movement secured to us a line fully a mile in advance of the one we occupied in the morning, and the one which the enemy had occupied up to this time. The fortifications were rapidly turned to face the other way. During the following night they were made strong. We lost in this preliminary action about eleven hundred killed and wounded, while the enemy probably lost quite as heavily, including the prisoners that were captured. With the exception of the firing of artillery, kept up from Missionary Ridge and Fort Wood until night closed in, this ended the fighting for the first day.