Half an hour after the 7th Regiment had crossed, the 8th and 9th Regiments started crossing the river south of it. By this time, the 5th Cavalry Regiment and all its supporting mortars and artillery were fully alerted. Flares and star shells brightly illuminated these two North Korean regiments in midstream. American fire from all supporting weapons, with the artillery playing the dominant role, decimated the enemy troops and turned them back to the west side. Only a small number reached the east side. There, either they were captured or they hid until the next night when they re-crossed the river.