[13] Biographer William W. Freehling says that young Harrison, in his first military act, rounded up about eighty thrill-seekers and troublemakers off Philadelphia's streets, talked them into signing enlistment papers, and marched them to Fort Washington.[5]
Harrison was promoted to lieutenant after Major General "Mad Anthony" Wayne took command of the western army in 1792, following a disastrous defeat under Arthur St. Clair.[12] In 1793, he became Wayne's aide-de-camp and acquired the skills to command an army on the frontier;[6] he participated in Wayne's decisive victory at the Battle of Fallen Timbers on August 20, 1794, which ended the Northwest Indian War.[14] He received the following commendation from Wayne for his role in the battle: "I must add the name of my faithful and gallant Aide-de-camp ... Lieutenant Harrison, who ... rendered the most essential service by communicating my orders in every direction ... conduct and bravery exciting the troops to press for victory.