The President of the United States of America takes pleasure in presenting a Third Bronze Oak Leaf Cluster in lieu of a Fourth Award of the Bronze Star Medal with Combat “V” to First Lieutenant (Infantry) Leonard A. Duston (ASN: 0-887694), United States Army, for heroic achievement during ground operations against a hostile force as a member of Headquarters and Headquarters Company, 2d Battalion, 15th Infantry Regiment, 3d Infantry Division, in action against an armed enemy in Korea. On 3 October 1951, the 2d Battalion had the mission of seizing and securing Hill 400, located in the vicinity of Chorwon, Korea. During the initial phases of the assault, Lieutenant Duston, S-2 of the Battalion, was occupying an observation post with other members of the Battalion Command Group. Observing the enemy moving up reinforcements, Lieutenant Duston left his position of cover and comparative safety and moved forward through intense enemy fire to an exposed position. From this site Lieutenant Duston brought such devastating supporting weapons fire to bear that the enemy reinforcements were completely cut off from their defending forces and were so dispersed that their reorganization was impossible. This action by Lieutenant Duston forced the enemy to withdraw and permitted the 2d Battalion to attain its objective. Lieutenant Duston then moved forward with the attacking unit and aided in organizing the battalion for the defense of their newly won objective. The heroism, initiative, and devotion to duty displayed by Lieutenant Duston reflect great credit upon himself and the military service.