The President of the United States of America, authorized by Act of Congress, July 8, 1918 (amended by act of July 25, 1963), takes pride in presenting the Silver Star (Posthumously) to Captain (Infantry) Donald Vernon McGregor (ASN: 0-74381), United States Army, for conspicuous gallantry and intrepidity in action while engaged in military operations against an armed enemy on 13 August 1963. Captain McGregor demonstrated sound judgment, fortitude, and professional competence as an infantry unit advisor to the 51st Infantry Regiment, 25th Infantry Division, Army of the Republic of Vietnam. When a lead company of Vietnamese forces received hostile gun fire from ambush during a routine battalion operation, Captain McGregor disregarded his own personal safety, proceeded to the forward area, and advised the leading company commander in the most effective tactics and maneuvers to achieve military objectives. His courageous action, personal example, and dedicated devotion to duty inspired the Vietnamese officers and men to greater efforts and assured the success of the mission. Throughout the entire day of combat operations, he rendered invaluable assistance, advice and encouragement to his Vietnamese comrades until he was mortally wounded. Captain McGregor’s conspicuous gallantry is in the highest traditions of the United States Army and reflects great credit upon himself and the military service.