The President of the United States of America, authorized by Act of Congress, July 9, 1918 (amended by act of July 25, 1963), takes pride in presenting the Distinguished Service Cross (Posthumously) to Sergeant Clarence Sizemore, United States Army, for extraordinary heroism in connection with military operations involving conflict with an armed hostile force in the Republic of Vietnam, while serving with Company A, 1st Battalion, 20th Infantry, 11th Infantry Brigade, Americal Division. Sergeant Sizemore distinguished himself by exceptionally valorous actions on 21 May 1969 while in charge of a bridge security force near Landing Zone Liz at Duc Pho in Quang Ngai Province. In the early morning hours his position was attacked by a North Vietnamese platoon of sappers utilizing machine guns, small arms, and rocket-propelled grenades. Seeing that the communists had penetrated the defenses near the north end of the bridge, he raced over there, releasing bursts from his automatic weapon at the aggressors as he ran. After he had killed one enemy soldier and repelled the assault, he returned to the opposite end of the bridge to resupply his ammunition, only to discover that a hostile force had overwhelmed several nearby bunkers. He rushed one of the captured fortifications, killed the occupant, and obtained rounds for his rifle. He was racing back toward the northern end when an enemy grenade detonated near him, spraying his legs with shrapnel. Noticing that the platoon radio-telephone operator lay helplessly wounded near the center of the bridge, and despite his own wounds, he crawled to the aid of the injured man. Sergeant Sizemore remained by his comrade as the ruthless assailants closed in from both sides. While attempting to hold the enemy at bay, he was mortally wounded by rifle fire. Sergeant Sizemore’s extraordinary heroism and devotion to duty, at the cost of his life, were in keeping with the highest traditions of the military service and reflect great credit upon himself, his unit, and the United States Army.