The President of the United States of America, in the name of Congress, takes pleasure in presenting the Medal of Honor to Seaman John Mack, United States Navy, for extraordinary heroism in action, serving as Seaman on board the U.S.S. Hendrick Hudson, St. Marks, Florida, 5 and 6 March 1865. Seaman Mack served with the Army in charge of Navy howitzers during the attack on St. Marks and, throughout this fierce engagement, made remarkable efforts in assisting transport of the gun. His coolness and determination in courageously standing by his gun while under the fire of the enemy were a credit to the service to which he belonged.