Special Field Orders 93, HQ, Dept. of the Cumberland, April 2, 1864 - Organization of the Cavalry. Ed McCook - partial list, link to full

Reorganization, Army of the Cumberland by General Thomas
April 1, 1864 (communicated April 2, 1864).

Special Field Orders 93
Headquarters, Department of the Cumberland, Chattanooga, April 2, 1864

VIII. The following is announced as the organization of the cavalry of this department, to take effect April 1, 1864:
    First Division, Col. Edward M. McCook, commanding:
    First Brigade: Second Michigan Cavalry, First Tennessee Cavalry, Eighth Iowa Cavalry.
 
    [etc., others are named]

(By order of Gen. George H. Thomas, through staff)

Official Records, Series 1, Volume 32, Part 3 (Correspondence, etc.), 238.
https://texashistory.unt.edu/ark:/67531/metapth152650/m1/247/

Edward M. McCook: Nomination to Brigadier, April 1864

Edward M. McCook's nomination to brigadier had come from the War Department in April. Reference: 2 April 1864, Letter from Edwin M. Stanton, War Department, Washington, to Maj.-Gen. Sherman. 

"General Grant's return is expected to-morrow. Colonel Hatch, of Iowa, and Colonel Edward M. McCook, are nominated for brigadiers."

Official Records, Series 1, Volume 32, Part 3 (Correspondence, etc.), 220.

https://texashistory.unt.edu/ark:/67531/metapth152650/m1/229/