Fed by intelligence from the Soviet Union, the North Koreans were aware the UN forces were building up along the Pusan Perimeter and that they had to conduct an offensive soon or else forfeit the battle. In planning its new offensive, the KPA commanders decided that any attempt to flank the UN force was impossible thanks to the support of UN naval forces. Instead, they opted to use frontal attacks to breach the perimeter and collapse it. A secondary objective was to surround Taegu and destroy the UN units in that city. As part of this mission, the KPA would first cut the supply lines to Taegu.