The NK 9th Division 's infantry crossing of the Naktong and attack on its east side near midnight quickly overran the positions of C Company , north of A Company . There the North Koreans assaulted in force , signaled by green flares and blowing of whistles . The company held its positions only a short time and then attempted to escape . Many of the men moved south , a few of them coming into A Company 's ridge line positions near Agok during the night . Most of C Company moved all the way to the 25th Division positions south of the Naktong . On September 1 that division reported that 110 men of C Company had come into its lines .