Johnson's force was originally intended to join General William Hull at Detroit, but Hull surrendered Detroit on August 16 and his army was captured. Harrison by then was in command of the entire Northwest frontier and ordered Johnson to relieve Fort Wayne in the northeast of the Territory, which was already being attacked by the Indians. On September 18, 1812, Johnson's men reached Fort Wayne in time to save it, and turned back an Indian ambush. They returned to Kentucky and disbanded, going out of their way to burn Potawatomi villages along the Elkhart River en route.