 Complete the following phrase:  On November 4, as the 7th Marines were advancing to the Chosin Reservoir, Lt. Mitchells platoon defended Hill 532, south of Sudong. Poynter was wounded there in hand-to-hand combat with the enemy. In spite of his wounds, when he saw three machine guns setting up only away, he charged the machine gun positions with hand grenades taken from fallen members of his squad, and was able to take out two machine guns. He was killed as he destroyed the third machine gun emplacement; on November 15, the 7th Marines and the 1st Marine Division completed their move north to 