On November 15, Confederate Col. Douglas H. Cooper, a former US Indian Agent, led 1,400 men, including pro-Confederate Indians, northward; he intended either to convince Opothleyahola and his followers to support the Confederacy or to "drive him and his party from the country." Believing Federal promises of assistance, Opothleyahola led his band (including Seminole under Halleck Tustenuggee) toward Kansas. Along the way, they had to fight three battles against their pursuers, and had lost many of their goods in their quick departure. At Round Mountain, Opothleyahola's forces drove back the Confederates to Fort Gibson.