The President of the United States of America, authorized by Act of Congress July 9, 1918, takes pleasure in presenting the Silver Star to Sergeant Calvin M. J. Buck (ASN: US-55037730), United States Army, for gallantry in connection with military operations against an opposing armed force as a member of Company C, 1st Battalion, 5th Regimental Combat Team, 24th Infantry Division, in action near Yongon-ni, Korea, on 19 October 1951. While attacking enemy positions, a group of riflemen from his company was pinned down by devastating enemy machine gun fire. With complete disregard for his own safety, Sergeant Buck, Squad Leader of a 57-mm. Recoilless Rifle Team, moved into a forward and exposed position. Firing with deadly accuracy, he destroyed the enemy machine gun nest, thus enabling his comrades to secure their objective with a minimum of casualties. Sergeant Buck’s courageous action, unswerving determination and selfless devotion to duty reflect the highest credit on himself and the United States Infantry.