From the record
“Fort Washita is the former United States military post and National Historic Landmark located in Durant, Oklahoma on SH 199. Established in 1842 by General Zachary Taylor to protect citizens of the Choctaw and Chickasaw Nations from the Plains Indians, it was later abandoned by Federal forces at the beginning of the American Civil War.”
Wikipedia article Fort Washita, CC BY-SA 4.0.
One of 17 National Register listings published here for Bryan County · listed in 1966 · category: District · a National Historic Landmark.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service