Darius Couch:
USA Darius N. Couch ldr_USA_Couch NULL NULL NULL NULL 7 10 1 22 General 1 NULL 2 2 2
http://en.wikipedia.org/wiki/Darius_N._Couch
Couch commanded the Federal II Corps at Fredricksburg and Chancellorsville, so you may want to add a Corps Commander entry for him. He didn't get along well with Hooker, and must have been extremely frustrated with the Army of the Potomac's performance in the previous fights, and as a result requested reassignment. However, Couch seems to have been considered a solid commander whose talents were wasted sitting on the sideline, and he shows up again in the Western Theater as a division commander in 1864/1865.