Record Data Place Unit Type State or Province Containing Unit United States of America Events Date Type 07/17/1863 In Indian Territory, Native American and African-American troops attack overrun Confederate supply base Battles/Soldiers 07/14/1865 In Indian Territory, the Chickasaw Nation becomes the last Confederate entity formally to surrender Battles/Soldiers 12/09/1861 In Indian Territory, Union and Confederate Native American troops clash at the Battle of Chusto-Talasah Battles/Soldiers People Places Name Type Tahlequah, IT City or Town Documents Date Title 07/20/1863 James G. Blunt to Frank J. Bramhall, July 20, 1863 Images Kansas, Nebraska, and Colorado, 1861, zoomable map