Isaiah Stillman (1793–15 April 1861) was an American Cavalry Major who led the Illinois militia in the first armed confrontation of the Black Hawk War against Black Hawk's Sauk Indian Band. The first armed confrontation would be named Battle of Old Man's Creek, but would later be named Stillman's Run after him.Isaiah Stillman was born and raised in the state of Massachusetts, but he left the east and traveled to Illinois to become a trader of pots, pans, and other items.