In spring and summer 1864 Fort Blair, Fort Henning and Fort Insley were constructed to help protect the town and post of Fort Scott from Confederate forces. Fort Insley was named for Capt. Martain H. Insley. It was located just northeast of town, about 1½ blocks northeast of the main part of the post of Fort Scott. It overlooked Buck Run Creek. After the Civil War Forts Henning and Insley were torn down. Fort Scott itself closed in October 1865.