A few minutes before dawn on the morning of March 26, the day the Iwo campaign officially closed, the Japanese launched a concentrated attack and penetrated the Marine lines in the area where 1st Lt Martin's platoon was bivouacked. He immediately organized a firing line among the men in the foxholes closest to his own, and temporarily stopped the headlong rush of the enemy. Several of his men were lying wounded in positions overrun by the enemy and the lieutenant was determined to rescue them. In the action which followed, he was severely wounded twice but continued to resist the enemy until he fell mortally wounded by a grenade.