 During the War of 1812 , during the summer of 1812 or 1813 , Alder was elected captain of a company of 70 men formed in Plain City . With Frederick Loyd as his lieutenant , Alder 's company was ordered by the Governor to march about twenty miles north and build a blockhouse at Mill Creek , about three miles north of Marysville , Ohio , to protect the Darby settlements . The company built and garrisoned the blockhouse for a few weeks , but when a false alarm was sounded regarding Indians attacking the settlements , the men returned to their homes . This was the only fort ever constructed in Union County , and some of the foundation is still visible today . 
