On August 20, the KPA commands distributed operations orders to their subordinate units. The plan called for a simultaneous five-prong attack against the UN lines. These attacks would overwhelm the UN defenders and allow the KPA to break through the lines in at least one place to force the UN forces back. Five battle groupings were ordered. The center attack called for the KPA 9th, 4th, 2nd and 10th Divisions to break through the US 2nd Infantry Division at the Naktong Bulge to Miryang and Yongsan.
