The President of the United States of America takes pleasure in presenting the Bronze Star Medal with Combat “V” to Master Sergeant [then Sergeant First Class] Ronald Earl Callahan (ASN: RA-20604456), United States Army, for heroic achievement during ground operations against a hostile force as a member of Company C, 1st Battalion, 15th Infantry Regiment, 3d Infantry Division, in action against an armed enemy in Korea. On 19 May 1951, near Choga-dong, Korea, Sergeant Callahan and five men were protecting the left flank of their platoon which was in the attack. As the friendly battalion to the platoon’s left flank moved forward, it came under heavy and accurate enemy machine gun fire, which from that position could not be observed. Sergeant Callahan seeing this, left his men in position and moved forward about 250 yards where he could personally bring fire on the enemy. Fully exposing himself to hostile fire, he effectively fired his rifle on the enemy position causing one enemy casualty and the remainder to flee. The heroic action initiated by Sergeant Callahan, which enabled the friendly troops to advance, reflects the highest credit upon himself and the military service.