On the night of August 5–6, 800 KPA soldiers began wading across the river at the Ohang ferry site, south of Pugong-ni and west of Yongsan, carrying light weapons and supplies over their heads or on rafts. A second force attempted to cross the river further north but met with resistance and fell back. On the morning of August 6, the KPA attacked in an attempt to penetrate the lines to Yongsan. This caught the Americans, who were expecting an attack from further north, by surprise and drove them back. Subsequently, the KPA were able to capture a large amount of American equipment. The attack threatened to split the American lines and disrupt supply lines to the north.