The Union forces were not idle, and during the night Rosecrans moved Thomas’ corps northeastward above and back of Crittenden, so that Bragg would not outflank the Federal line. Negley’s Division remained near Crawfish Springs (now Chickamauga), Maj. Gen. Joseph J. Reynolds’ Division near Widow Glenn’s, and Brigadier Generals Absalom Baird’s and John M. Brannan’s Divisions covered the roads leading to Reed’s and Alexander’s Bridges. General McCook’s Corps moved to position in McLemore’s Cove. The situation at dawn on the 19th found the two armies facing each other over a stretch of several miles along the banks of the Chickamauga. Rosecrans had been able in a short time to maneuver the Army of the Cumberland into position so that it interposed between Bragg and Chattanooga. His Reserve Corps under General Granger was at McAfee’s Church, near Rossville. Thomas’ Fourteenth Army Corps composed the Union’s left a few miles south of Granger, and formed a southwesterly line to Crawfish Spring where it joined McCook, forming the right in McLemore’s Cove. Crittenden’s Twenty-First Army Corps remained concentrated at Lee and Gordon’s Mills, somewhat in front of the other two corps, to protect the Union center. Table 1.—_Union Army at Chickamauga_ _Army of the Cumberland_—Maj. Gen. William S. Rosecrans _Fourteenth Army Corps_—Maj. Gen. George H. Thomas 1st Division—Brig. Gen. Absalom Baird 2d Division—Maj. Gen. James S. Negley 3d Division—Brig. Gen. John M. Brannan 4th Division—Maj. Gen. Joseph J. Reynolds _Twentieth Army Corps_—Maj. Gen. Alexander McD. McCook 1st Division—Brig. Gen. Jefferson C. Davis 2d Division—Brig. Gen. Richard W. Johnson 3d Division—Maj. Gen. Philip H. Sheridan _Twenty-first Army Corps_—Maj. Gen. Thomas L. Crittenden 1st Division—Brig. Gen. Thomas J. Wood 2d Division—Maj. Gen. John M. Palmer 3d Division—Brig. Gen. H. P. Van Cleve _Reserve Corps_—Maj. Gen. Gordon Granger 1st Division—Brig. Gen. James B. Steedman 2d Division—Col. Daniel McCook _Cavalry Corps_—Brig. Gen. Robert B. Mitchell 1st Division—Col. Edward M. McCook 2d Division—Brig. Gen. George Crook [Illustration: _“The First Gun at Chickamauga.” Confederates open fire on Union cavalry at Reed’s Bridge._ A. R. Waud wartime sketch. From Brown, _The Mountain Campaign in Georgia_.] Table 2.—_Confederate Army at Chickamauga_ _Army of Tennessee_—Gen. Braxton Bragg[1]