Daily AncestorHundred Days Men
Hundred Days Men were Union volunteers who enlisted for 100 days in 1864, mostly from Ohio and the Midwest, to guard rear areas and free veterans for combat.
The plan came from Ohio governor John Brough in the spring of 1864. Ohio, Indiana, Illinois, Iowa and Wisconsin offered short-term troops, largely from their militia, for guard, garrison and labor duty. Ohio furnished by far the largest share.
A regiment marked 100 days explains a service of only a few months in 1864, and it is no sign of desertion or early discharge.
As seen in a recordCivil War compiled service record card
Mustered in June 1864, Co. A, 141st Ill. Inf., 100 days
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Daily Ancestor. "Hundred Days Men." Dictionary of Old Record Words. https://dailyancestor.com/dictionary/military/hundred-days-men. Last checked 2026-10-03.