Source:  Medal of Honor Citations; http://www.army.mil/cmh-pg/moh1.htm

ROY, STANISLAUS

Rank and organization: Sergeant, Company A, 7th U.S. Cavalry. Place and date: 
At Little Big Horn, Mont., 25 June 1876. Entered service at:------. Birth:
France. Date of issue: 5 October 1878. Citation: Brought water to the wounded
at great danger to life and under a most galling fire of the enemy.