During the night Schmitt established radio communication with the 1st Battalion , 9th infantry . When daylight came Schmitt and his group saw that they were surrounded by North Koreans . One force occupied the higher knob half a mile above them , formerly held by B Company . Below them , North Koreans continued crossing the river and moving supplies forward to their combat units , some of them already several miles eastward . The North Koreans quickly discovered Task Force Manchu group . They first attacked it at 14 : 00 that afternoon , and were repulsed . That night an estimated company attacked three times , pressing the fight to close quarters , but failed each time to penetrate the tight US perimeter . Daylight of the second day disclosed many North Korean dead on the steep slopes outside the perimeter .