In autumn of 1811, John Mann and Alexander Ewing had scouted for Harrison near Prophetstown, Indiana. Sometime after their return to Ohio, both are promoted to the rank of Colonel by Governor Meigs for “acts of valor”. In early 1812, John Mann was elected as Colonel over the Miami County Militia. At that time, county militia hierarchies were determined by popular vote within each count militia.
At the outset of the war, Colonel Mann established several independent rifle companies to patrol the frontier. Fortifications are established or re-established at Covington, Fort Loramie, Greenville, Piqua, Sidney, St. Marys, and Staunton.
The locations of these structures were previously areas used by General Anthony Wayne with the exception Fort Mann in Sidney, and the Fort at Staunton. Staunton was Miami County's seat at this time, and Fort Mann in Sidney was on or near a trail following the Miami River that led to Colonel Johnston's headquarters at Upper Piqua.
In 1813, the Miami County Militia became part of the 5th Division of the Ohio Militia. Area Indian attacks during the war included men being killed at St. Marys, Urbana, Springfield, and Greenville. Two young girls were killed while traveling one half mile from Greenville, and two men traveling from Greenville to Preble County were also murdered. Indians then attacked settlers in Miami County.
The double murder of Mr. and Mrs. Dilbone occurred east of Piqua was followed by the murder of David Gerard that occurred on Spring Creek.
Later, toward the close of the war, Jane Williamson Carey, wife of Cephas Carey who lived in Hardin, Ohio, was killed when several Shawnee attacked the Carey Blockhouse on their farm (August 1814). Cephas was the blockhouse adjutant, having built the blockhouse for his family and other early Shelby County area settlers to take shelter.
All throughout the war, Miami County’s men continued to run a line of defense from Urbana to St. Mary's, and discouraged invasion on the western border of the state. They patrolled the areas, were stationed at blockhouses, and moved to and from Staunton, Piqua, Sidney, Covington, Greenville, Fort Loramie, St. Marys, Urbana, and Wapakoneta.
Governor Meigs was on the frontier and ordered Miami’s men to perform widespread duties, including staffing detachments. Men that did not patrol manned local blockhouses.
Immediately following General Hull's surrender, Harrison marched north in his famous campaign toward the Indian Territories. He and his favored Kentucky Militia came through Miami County. He used these men because he had prior battle experience with them. It is also important to remember that Kentucky had more established settlement. 30 years on the frontier provided a more established, organized, and disciplined army.
His friend and ally, Colonel John Johnston, a Federal Indian Agent located in the northern part of the county, also found the Miami Militia uncooperative. Although Johnston was representing the Federal government, he was not part of the Ohio Militia leadership hierarchy, and consequently the Militia did not always answer his requests.