The position of B Company, 35th Infantry, on 1,100-foot-high Sibidang-san, flanking the Masan road two miles west of Kŏmam-ni and giving observation over all the surrounding country, was certain to figure prominently in the enemy's attack. It was a key position in the 25th Division line. The enemy's preparatory barrage there lasted from 1130 to midnight.
Under cover of it two battalions of the N.K. 13th Regiment, 6th Division, moved up within 150 yards of the American foxholes. At the same time, enemy tanks, self-propelled guns, and antitank guns moved toward Kŏmam-ni on the road at the foot of Sibidang-san.
An American Sherman tank there destroyed a T34 just after midnight, and a 3.5-inch bazooka team destroyed a self-propelled gun and several 45-mm. antitank guns.
On the crest of Sibidang-san, an antipersonnel mine field stopped the first enemy infantry assault. Others followed in quick succession. They were met and turned back with the fire of all weapons.