On the regimental left along the main Pugong @-@ ni @-@ Changnyong road North Korean soldiers completely overran C Company by 0300 September 1 . Only seven men of C Company could be accounted for , and three days later , after all the stragglers and those cut off behind North Korean lines had come in , there were only 20 men in the company . As the North Korean attack developed during the night , 1st Battalion succeeded in withdrawing a large part of its force , less C Company , just north of Lake U @-@ p 'o and the hills there covering the northern road into Changnyong , 3 miles ( 4 @.@ 8 km ) east of the river and 5 miles ( 8 @.@ 0 km ) west of the town . B Company lost heavily in this action .