The President of the United States of America, authorized by Act of Congress July 9, 1918, takes pleasure in presenting the Silver Star to Master Sergeant Herbert C. Y. Sun (ASN: RA-29040109), United States Army, for conspicuous gallantry and intrepidity in action against the enemy as a member of Company L, 23d Infantry Regiment, 2d Infantry Division. Master Sergeant Sun distinguished himself by gallantry in action on 19 September 1951, in the vicinity of Suim-nyon, Korea. On this date his platoon was defending its newly-won positions against a numerically superior hostile force. Sergeant Sun repeatedly exposed himself to the intense enemy fire in a valiant attempt to set up an adequate defense line. Circulating among his men he shouted words of encouragement and directed them in delivering accurate and effective fire on the onrushing hostile force. On numerous occasions he advanced over the fire-swept area to administer aid to his wounded comrades and assisted in their evacuation. During the entire battle Sergeant Sun remained with the most forward elements of his unit and by his example of bravery under fire inspired his men to turn the enemy attack into a complete rout. The gallantry in action and selfless devotion to duty displayed by Sergeant Sun on this occasion reflect great credit upon himself and the military service.