The President of the United States of America, authorized by Act of Congress, July 9, 1918, takes pleasure in presenting the Silver Star (Army Award) to Second Lieutenant John O. Williams, Jr. (MCSN: 0-49705), United States Marine Corps, for conspicuous gallantry and intrepidity in action against the enemy while serving with a Marine Infantry Company of the FIRST Marine Division (Reinforced), in Korea. On 18 August 1950, Lieutenant Williams, serving as a Rifle Platoon Commander, was given the mission of seizing and securing a steep hill near Yongsan, Korea, which was strongly defended by a well-entrenched enemy. Displaying outstanding leadership, he led his platoon up the hill, fearlessly exposing himself to direct enemy fire in order to coordinate and direct the attack. During the final phase of the assault, the enemy mounted a fanatical counterattack, employing hand grenades and intense automatic-weapons fire. Despite the intensity of the enemy fire, he moved to a position well forward of his platoon and directed his men to pass him hand grenades, which he used with such accuracy that the enemy was pinned down, thereby enabling his platoon to overrun the enemy positions. The aggressive leadership and gallant actions of Lieutenant Williams reflect great credit on himself and are in keeping with the highest traditions of the United States Naval Service.