Savannah campaign Union order of battle

The following Union Army units and commanders fought in the Savannah campaign (or Sherman's March to the Sea) of the American Civil War. The Confederate order of battle is listed separately. Order of battle compiled from the army organization during the campaign.
Union Forces.
MG William T. Sherman, Commanding
Headquarters guard:
Engineers:
Right Wing (Army of the Tennessee).
MG Oliver O. Howard<br>
Escort:
XV Corps.
MG Peter J. Osterhaus
XVII Corps.
MG Francis Preston Blair, Jr.<br>
Escort:
Left Wing (Army of Georgia).
MG Henry W. Slocum
Pontoniers:
XIV Corps.
Bvt MG Jefferson C. Davis
XX Corps.
BG Alpheus S. Williams