Capt. Charles Varnum, a graduate of West Point, was the commander of Crow and Arikaree scouts for the 7th Cavalry based at Ft. Lincoln. He was involved in several expeditions including the Yellowstone Expedition, the Black Hills Expedition, and the Sioux Wars where he and his scouts reported a huge Indian village near the Little Bighorn River. After reporting to Custer, his advice was ignored and Custer decided to attack resulting in the terrible defeat. Varnum accompanied Marcus Reno and Frederick Benteen, and survived the battle. He continued with the 7th Cavalry and was awarded the Army Medal of Honor for distinguished gallantry in 1897. He was the last surviving officer of the Battle of the Little Bighorn when he died in 1936 at the age of 86.