The brash, young lieutenant won a Medal of Honor in 1886 when he rescued one of his wounded troopers during a fight in the Pinito Mountains of Sonora, Mexico. Clarke shows up in several of the artist Frederic Remington’s famous renderings from the period, most notably The Arrival of a Courier and a series on the Buffalo Soldiers, whom Clarke commanded out of San Carlos in Arizona. A promising career was cut short when he drowned in Montana’s Little Bighorn River in 1893, when he struck his head while diving to rescue a soldier from the flooding stream.
He was only 30.