The President of the United States of America, in the name of Congress, takes pleasure in presenting the Medal of Honor to Private Thomas Joseph Callen, United States Army, for extraordinary heroism on June 25 & 26, 1876, while serving with Company B, 7th U.S. Cavalry, in action at Little Big Horn, Montana. Private Callen volunteered and succeeded in obtaining water for the wounded of the command; also displayed conspicuously good conduct in assisting to drive away the Indians.