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 Lieutenant Colonel (Armor) Bob Leroy Gregory (ASN: 0-69663), 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 2d Battalion, 12th Cavalry, 1st Cavalry Division. Lieutenant Colonel Gregory distinguished himself by exceptionally valorous actions on 2 and 3 January 1968 as commanding officer of an airmobile cavalry battalion conducting operations against a North Vietnamese Army division in the Que Sons Valley. During the afternoon of 2 January, one of his companies on a search and destroy mission became heavily engaged with an enemy force of undetermined size. Colonel Gregory immediately boarded his command and control helicopter and flew to the battle site. Disregarding a hail of hostile ground fire tracking his aircraft, he remained over the raging firefight and directed gunship fire and aerial rocket artillery on enemy positions. When the ground commander attempted to move his main force to relieve one platoon that was surrounded by the North Vietnamese, Colonel Gregory instructed his pilot to descend, leaped from the helicopter amid intense automatic weapons fire and rallied the troops in their maneuver. As darkness approached, he directed the helicopter evacuation of wounded and supervised the extraction of the beleaguered company. During the early morning hours of 3 January, the battalion fire base was attacked by two North Vietnamese Army regiments. Braving savage rocket, mortar and automatic weapons fire, Colonel Gregory unhesitantly moved from the relative safety of his bunker to the tactical operations center, where he quickly organized his defenses to repel the attack. He repeatedly exposed himself to the hostile fusillade as he moved among his troops and encouraged their fierce fight against the determined attackers. His fearless and inspiring leadership was responsible for the successful defense of the base and over two hundred North Vietnamese killed. Lieutenant Colonel Gregory’s extraordinary heroism and devotion to duty were in keeping with the highest traditions of the military service and reflect great credit upon himself, his unit, and the United States Army.