Private William S. Harris distinguished himself by acts of gallantry and intrepidity above and beyond the call of duty on May 13, 1899, while serving as a member of Troop G, 4th United States Cavalry at San Miguel de Mayumo, Luzon, Philippine Islands. On this occasion about 300 of the enemy were drawn up in line in an advantageous position requiring a frontal attack. Without waiting for the supporting battalion to reinforce them, or to get into a position to do so, Private Harris and 11 other Scouts charged the line of the enemy, about 150 yards distant, and completely routed them. Private Harris’ conspicuous gallantry, extraordinary heroism, and intrepidity at the risk of his life, above and beyond the call of duty, are in keeping with the highest traditions of military service and reflect great credit upon himself, his unit, and the United States Army.
Approval for the Medal of Honor was made on January 8, 1906, by President Theodore Roosevelt, Jr., but the Medal was not physically awarded until January 16, 2025.