With 4 other men, he was leading in a frontal assault 2 October 1944, on a Siegfried Line pillbox near Palenberg, Germany. Machinegun fire from the strongly defended enemy position 25 yards away pinned down the attackers. The Germans threw hand grenades, 1 of which dropped between Pvt. Kiner and 2 other men. With no hesitation, Private Kiner hurled himself upon the grenade, smothering the explosion. By his gallant action and voluntary sacrifice of his own life, he saved his 2 comrades from serious injury or death.