Divisions Brigades 1. James Barnes 1. William S. Tilton, Col. Brigadier General 2. Jacob B. Sweitzer, Col. 3. Strong Vincent, Col. 2. George Sykes 1. Hannibal Day, Col. Major General 2. Sidney Burbank, Col. Romeyne B. Ayres 3. Stephen Weed, Brig. Gen. Brigadier General 3. Samuel W. Crawford 1. William McCandless, Col. Brigadier General 2. Joseph W. Fisher, Col. Sixth Corps John Sedgwick, Major General Divisions Brigades 1. Horatio G. Wright 1. Alfred T. A. Torbet, Brig. Gen. Brigadier General 2. Joseph J. Bartlett, Brig. Gen. 3. David A. Russell, Brig. Gen. 2. Albion P. Howe 1. Lewis A. Grant, Col. Brigadier General 2. Thomas H. Neill, Brig. Gen. 3. John Newton 1. Alexander Shaler, Brig. Gen. Major General 2. Henry L. Eustis, Col. Frank Wheaton 3. Frank Wheaton, Brig. Gen. Brigadier General Eleventh Corps Oliver O. Howard, Major General Divisions Brigades 1. Francis C. Barlow 1. Leopold von Gilsa, Col. Brigadier General 2. Adelbert Ames, Brig. Gen. 2. Adolph von Steinwehr 1. Charles Coster, Col. Brigadier General 2. Orlando Smith, Col. 3. Carl Schurz 1. Alexander Schimmelfennig, Brig. Gen. Major General 2. W. Krzyzanowski, Col. Twelfth Corps Henry W. Slocum, Major General Divisions Brigades 1. Alpheus S. Williams 1. Archibald L. McDougal, Col. Brigadier General 2. Henry H. Lockwood, Brig. Gen. 3. Thomas H. Huger, Brig. Gen. 2. John W. Geary 1. Charles Candy, Col. Brigadier General 2. George A. Cobham, Col. Cavalry Alfred Pleasanton, Major General Divisions Brigades 1. John Buford 1. William Gamble, Col. Brigadier General 2. Thomas C. Devin, Col. 3. Wesley Merritt, Brig. Gen. 2. David McM. Gregg 1. John B. McIntosh, Col. Brigadier General 2. Pennock Ruey, Col. 3. J. Irvin Gregg, Col. 3. Judson Kilpatrick 1. Elon J. Farnsworth, Brig. Gen. Brigadier General 2. George A. Custer, Brig. Gen. Chief of Artillery, Brigadier-General Henry J. Hunt Number of guns belonging to the Artillery, 362 Number of guns at Gettysburg, 354 ORGANIZATION OF THE ARMY OF NORTHERN VIRGINIA General Robert E. Lee