A sutler or victualer is a civilian who sells provisions to an army in the field, in camp or in quarters. The word, like numerous other naval and military terms, came into English from Dutch, where it appears as soetelaar or zoetelaar. It meant originally "one who does dirty work, a drudge, a scullion", and derives from zoetelen (to foul, sully), a word cognate with "suds" (hot soapy water), "seethe" (to boil) and "sodden". (wikipedia)
A traditional occupation for Jews, including during the American Civil War.