Fort Maginnis - Credit: Wikimedia Commons
Fort Maginnis was established during the Indian wars in the Department of Dakota by the U.S. Army. It was the last of five forts: Keogh (1876), Custer (1877), Missoula (1877), Assinniboine (1879), and Maginnis (1880) - built following the defeat of Lieutenant Colonel George A. Custer by Native Americans at the Battle of Little Bighorn in June, 1876. Read more on Wikipedia
Source: en.wikipedia.org