On the night of April 24, 1951, he was manning a machine gun on the front lines, under heavy attack by Chinese forces. As the Chinese soldiers threatened to overwhelm his position, he charged the enemy with a bayonet, killing 10 before returning to his position to administer first aid to his wounded men and to direct their retreat.
As the enemy launched another assault, he remained in position, firing on them until he ran out of ammunition. He disabled the machine gun to keep it from falling into enemy hands and grabbed his bayonet again, cutting through the enemy line to get to another machine gun position where he continued to fire on the enemy as his squad withdrew. Despite being severely wounded, he held his ground, providing cover for his unit, until his position was overwhelmed. The last time his men saw him, he was fighting ferociously against an overwhelming onslaught of enemy combatants.
The Chinese captured him and held as a Prisoner of War. He spent two years in a prison camp before being released with 19 other POWs on August 23, 1953. The U.S. Army and Miyamura’s family didn’t know that the young corporal had survived the battle for over a year, because the Chinese didn’t release the names of their prisoners of war.