 He scouted the approaching Confederate troops and provided information for Emory to capture their advance guard, who were the first prisoners captured during the Civil War.Black Beaver guided more than 800 Union soldiers, their prisoners, and 200 teamsters managing 80 wagons and 600 horses and mules in a mile-long train across 500 miles of open prairie to safety at Fort Leavenworth in eastern Kansas; he did not lose a single man, horse or wagon.He also freed multiple slaves from each of the Five Civilized Tribes.