The North Korean 2nd and 9th Divisions were almost completely destroyed in the battles . The 9th Division had numbered 9 @,@ 350 men at the beginning of the offensive on September 1 . The 2nd Division numbered 6 @,@ 000 . Only a few hundred from each division returned to North Korea after the fight . The majority of the North Korean troops had been killed , captured or deserted . All of NK II Corps was in a similar state , and the North Korean army , exhausted at Pusan Perimeter and cut off after Inchon , was on the brink of defeat .