On the night of April 24, 1951, Miyamura's unit occupied a defensive position near Taejon, South Korea, when it was attacked by the enemy. As the enemy force overran the Americans' position, Corporal Miyamura, a machine-gun squad leader, leaped from his shelter and, in close hand-to-hand combat, killed 10 of the enemy with his bayonet. After the first attack, while Miyamura administered first aid to the wounded and ordered the evacuation of his men, the enemy dealt another savage blow. Miyamura delivered devastating fire with his machine gun until he ran out of ammunition. He then bayoneted his way to a second gun emplacement and covered the withdrawal of his unit with machine gun fire until his ammunition was depleted. Miyamura killed more than 50 of the enemy before he was severely wounded and later captured. He spent 28 months as a prisoner of war and was released in August 1953. Word of his Medal of Honor was kept secret during his time in captivity for his protection.