Command Turnover in the Army of the Potomac

July 1862
Commander - McClellan
Corps Commanders - 8 (Banks, McDowell, Porter, Franklin, Keyes, Sumner, Burnside, Heintzelman)

Changes
-New Corps Commanders - 2 (Reno and Siegal)
-Deleted Commanders - 1 (Keyes transferred)

2nd Bull Run
Commander - Pope
Total Corps Commanders - 9

After Battle Changes
-New Corps Commanders - 2 (Added Hooker, Mansfield)
-Deleted Corps Commanders - 3 (Reno KIA, Banks & McDowell Transferred)

Antietam
Commander - McClellan
Total Corps Commanders - 8

After Battle Changes
-New Corps Commanders - 7 (Butterfield, Couch, Reynolds, Slocum, Smith, Stoneman, Wilcox)
-Deleted Corps Commanders - 3 (Porter Court-Martialed, Mansfield KIA , Burnside Promoted )

Fredericksburg
Commander - Burnside
Total Corps Commanders (includes Grand Division) - 11

After Battle Changes
-New Corps Commanders - 4 (Meade, Howard, Sickles, Sedgwick)
-Deleted Commanders - 7 (Hooker & Butterfield Promoted, Smith/Wilcox/Sumner/Franklin/Siegal Transferred)


Chancellorsville
Commander - Hooker
Total Corps Commanders - 8

After Battle Changes
-New Corps Commanders - 3 (Hancock, Sykes, Pleasonton)
-Old Commanders Gone - 3 (Couch & Stoneman Transferred - Meade Promoted)

Gettysburg
Commander - Meade
Total Corps Commanders - 8

After Battle Changes
-New Corps Commanders - 3 (Burnside, Warren, Sheridan)
-Old Commanders Gone - 6 (Reynolds KIA, Sickles WIA, Slocum/Howard/Sykes/Pleasonton Transferred)


Wilderness
Commander - Grant/Meade
Total Corps Commanders - 5

After Battle Changes
-New Corps Commanders - 2 (Smith, Wright)
-Old Commanders Gone - 1 (Sedgwick KIA)

Petersburg (July 1864)
Commander - Grant/Meade
Total Corps Commanders - 6

After Battle Changes
-New Corps Commanders - 2 (Ord, Parke)
-Old Commanders Gone -2 (Burnside & Smith Resigned)

Petersburg (Oct 1864)
Commander - Grant/Meade
Total Corps Commanders - 6