Two well known battles of the Northwest Indian War took place at Fort Recovery. At the time, Ohio was claimed and populated by Native American nations, and conflict broke out when the young United States established settlements north of the Ohio River. In 1791, Northwest Territory governor Arthur St. Clair led a campaign north from Fort Washington to pacify the Western Confederacy at Kekionga. Instead, the United States force was destroyed in the early morning of November 4. St. Clair's Defeat remains the greatest loss by the United States Army to a Native American force.