Before the morning of 1 September had passed , reports coming in to US 2nd Division headquarters made it clear that North Koreans had penetrated to the north @-@ south Changnyong @-@ Yongsan road and cut the division in two ; the 38th and 23d Infantry Regiments with the bulk of the division artillery in the north were separated from the division headquarters and the 9th Infantry Regiment in the south . Keiser decided that this situation made it advisable to control and direct the divided division as two special forces . Accordingly , he placed the division artillery commander , Brigadier General Loyal M. Haynes , in command of the northern group . Haynes ' command post was 7 miles ( 11 km ) north of Changnyong . Task Force Haynes became operational at 10 : 20 , September 1 . Southward , in the Yongsan area , Keiser placed Brigadier General Joseph S. Bradley , Assistant Division Commander , in charge of the 9th Infantry Regiment , the 2nd Engineer Combat Battalion , most of the 72nd Tank Battalion , and other miscellaneous units of the division . This southern grouping was known as Task Force Bradley .