The North Koreans advanced to Changnyong itself during the afternoon of September 2 , and ROK National Police withdrew from the town . North Koreans were in Changnyong that evening . With his communications broken southward to the 2nd Infantry Division headquarters and the 9th Infantry , Haynes during the day decided to send a tank patrol down the Yongsan road in an effort to re @-@ establish communication . C Company , 72nd Tank Battalion , led its tanks southward . They had to fight their way down the road through several roadblocks . Of the three tanks that started , only the lead tank got through to Yongsan . There , it delivered an overlay of Task Force Haynes ' positions to Bradley .