Liaison planes rose from the division strip every hour to observe the North Korean progress and to locate US 2nd Infantry Division front @-@ line units . Communication from division and regimental headquarters to nearly all the forward units was broken . Beginning at 09 : 30 and continuing throughout the rest of the day , the light aviation section of the division artillery located front @-@ line units cut off by the North Koreans , and made fourteen airdrops of ammunition , food , water , and medical supplies . As information slowly built up at division headquarters it became apparent that the North Koreans had punched a hole 6 miles ( 9 @.@ 7 km ) wide and 8 miles ( 13 km ) deep in the middle of the division line and made less severe penetrations elsewhere . The front @-@ line battalions of the US 9th and 23rd Regiments were in various states of disorganization and some companies had virtually disappeared . Keiser hoped he could organize a defense along the Changnyong @-@ Yongsan road east of the Naktong River , and prevent North Korean access to the passes eastward leading to Miryang and Ch 'ongdo .