Michael Donahue
Enlisted on 5/27/1863 as a Private.
On 5/27/1863 he mustered into "C" Co. MD 2nd Battn Cavalry

Sources used by Historical Data Systems, Inc.:
- Index to Compiled Confederate Military Service Records

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Michael Donahue, Private, Company C, 2nd (Gillmore’s) Battalion Maryland Cavalry, deserted about October 1, 1863, ________, Va., forwarded to Philadelphia, Pa., from Harrisburg, Pa. October 7, 1863, no other records

Compiled Service Records of Confederate Soldiers Who Served in Organizations From the State of Maryland.

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This is the only other Michael Donahue I find in a Confederate unit:

Michael C. Donahue
Enlisted as a Captain (date unknown).
"I" Co. CS 1st Battn Infantry

Sources used by Historical Data Systems, Inc.:
- Index to Compiled Confederate Military Service Records

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Michael C. Donahue, 1st Lieutenant, Company B, 1st Infantry Battalion, CSA, enrolled January 28,1862 at Ft. Morgan for the war, promoted Captain, admitted Gen. Hosp., Petersburg, Va.,August 19, 1864 gunshot wound, died same day

Compiled Service Records of Confederate Soldiers Who Served in Organizations Raised Directly by the Confederate Government.