Daily AncestorMustered in
Mustered in means a soldier or a new unit was formally enrolled in military service and entered on the muster-in roll.
To muster in was to enroll a soldier, or a whole new unit, formally into military service and account for him on a roll. When a regiment was created it was mustered in, and when it disbanded it was mustered out.
Civil War compiled service records usually include a muster-in card copied from that roll. It can give the man's name, enlistment date, period of service, residence at enlistment and a physical description, and other cards may note a bounty paid.
As seen in a recordMuster-in card in a Civil War compiled military service record
Mustered in Aug. 22, 1862, at Camp Dennison, O., for 3 yrs.
Sources
How to cite this page
Daily Ancestor. "Mustered in." Dictionary of Old Record Words. https://dailyancestor.com/dictionary/military/mustered-in. Last checked 2026-10-03.