 Members of the Five Civilized Tribes, and others who had relocated to the Oklahoma section of Indian Territory, fought primarily on the side of the Confederacy during the American Civil War in Indian territory.Brigadier General Stand Watie, a Confederate commander of the Cherokee Nation, became the last Confederate general to surrender in the American Civil War, near the community of Doaksville on June 23, 1865.The Reconstruction Treaties signed at the end of the Civil War fundamentally changed the relationship between the tribes and the U.S. government.