Brig. Gen. John M. Brannan, Chief of Artillery, Army of the Cumberland, had his headquarters at 302 Walnut Street. Brig. Gen. Absalom Baird, U. S. V., commanding 14th Army Corps, was located on the south side of West Ninth Street, between East Terrace and Cedar Streets. A long post at this address marks the site. The College building which accommodated 100 wounded soldiers was located on the northeast corner West Eleventh and Cedar streets. ORGANIZATION OF THE UNION AND CONFEDERATE ARMIES AT CHICKAMAUGA UNION The Army of the Cumberland (Union) commanded by Maj. Gen. William S. Rosecrans, consisted of the following: 14th Army Corps Maj. Gen. George H. Thomas 20th Army Corps Maj. Gen. Alexander McD. McCook 21st Army Corps Maj. Gen. Thomas L. Crittenden Cavalry Corps Brig. Gen. Robert B. Mitchell Reserve Corps Maj. Gen. Gordon Granger Thomas had 4 divisions, commanded by Baird, Negley, Brannan and Reynolds. Baird had 3 brigades, commanded by Scribner, Starkweather and John H. King. Negley had 3 brigades, commanded by John Beatty, Stanley and Sirwell. Brannan had 3 brigades, commanded by Connell, Croxton and Van Derveer. Reynolds had 3 brigades, commanded by Wilder, Edward A. King and Turchin. McCook had 3 divisions, commanded by Jefferson C. Davis, Richard W. Johnson and Sheridan. Davis had 3 brigades, commanded by Post, Carlin and Heg. Johnson had 3 brigades, commanded by Willich, Dodge and Baldwin. Sheridan had 3 brigades, commanded by Lytle, Laiboldt and Bradley. Crittenden had 3 divisions, commanded by Thomas J. Wood, Palmer and Van Cleve. Wood had 3 brigades, commanded by Geo. P. Buell, Wagner and Harker. Palmer had 3 brigades, commanded by Cruft, Hazen and Gross. Van Cleve had 3 brigades, commanded by Sam Beatty, Dick and Barnes. Granger had 1 division, commanded by Steedman, consisting of 2 brigades, commanded by Whitaker and Mitchell. The 2nd brigade of Morgan’s division commanded by Daniel McCook, also participated in the battle. Mitchell had 2 divisions, commanded by Edward M. McCook and Crook. McCook had 3 brigades, commanded by Campbell, Ray and Watkins. Crook had 2 brigades, commanded by Minty and Long. Of these 38 brigades, 36 were engaged. Post’s brigade was guarding supply trains. Wagner’s brigade was stationed at Chattanooga during the battle. Wilder’s brigade was detached and serving as mounted infantry. There were two regiments not engaged. The 9th Michigan Infantry and the 38th Ohio Infantry were guarding trains and performing Provost Duty. The 39th Indiana Infantry also served as mounted infantry (being detached). CONFEDERATE