 He was mortally wounded after advancing from his relatively safe position in the rear to help his company's lead platoon's medical corpsmen evacuate numerous wounded away from the enemy kill zone.Just before Singleton was killed by enemy fire, he managed to make a single-handed assault with a machine gun on the enemy's position and destroy it, killing eight and driving the remainder away.It was for these acts of bravery, which had saved several more of his comrades' lives, that he was awarded the Medal of Honor.