The Battle of Stillman's Run, also known as the Battle of Sycamore Creek or the Battle of Old Man's Creek, occurred on May 14, 1832. The battle was named for Major Isaiah Stillman and his detachment of 275 Illinois militia which fled in a panic from the smaller number of Sauk warriors. The engagement was the first battle of the Black Hawk War (1832) which had developed when Black Hawk crossed the Mississippi River from Iowa into Illinois with his British Band of Sauk and Fox.