Vietnam War Medal of Honor Recipient. He served in the United States Marine Corps during the War in Vietnam as a Lance Corporal in Company F, 2nd Battalion, 4th Marines, 3rd Marine Division (Rein), Fleet Marine Force. He was awarded the CMOH for his bravery near Con Thein, Republic of Vietnam, on September 21, 1967. His citation reads "For conspicuous gallantry and intrepidity at the risk of his life above and beyond the call of duty while serving as a machine gunner with Company F. During a reconnaissance operation L/Cpl. Barker's squad was suddenly hit by enemy sniper fire. The squad immediately deployed to a combat formation and advanced to a strongly-fortified enemy position, when it was again struck by small arms and automatic weapons fire, sustaining numerous casualties. Although wounded by the initial burst of fire, L/Cpl. Barker boldly remained in the open, delivering a devastating volume of accurate fire on the numerically-superior force. The enemy was intent upon annihilating the small Marine force and, realizing that L/Cpl. Barker was a threat to their position, directed the preponderance of their fire on his position. He was again wounded, this time in the right hand, which prevented him from operating his vitally-needed machine gun. Suddenly and without warning, an enemy grenade landed in the midst of the few surviving Marines. Unhesitatingly and with complete disregard for his personal safety, L/Cpl. Barker threw himself upon the deadly grenade, absorbing with his body the full and tremendous force of the explosion. In a final act of bravery, he crawled to the side of a wounded comrade and administered first aid before succumbing to his grievous wounds. His bold initiative, intrepid fighting spirit, and unwavering devotion to duty in the face of almost certain death undoubtedly saved his comrades from further injury or possible death and reflected great credit upon himself, the Marine Corps, and the U.S. Naval Service. He gallantly gave his life for his country." His Medal was presented to his family on October 31, 1969, at the White House by Vice-President Spiro T. Agnew. His name can be found on Panel 26E, Line 99, on the Vietnam Memorial in Washington, D.C.