 By June 28, the 766th had infiltrated into Taebaek-san from Uljin and was moving toward Ilwolsan, Yongyang and Cheongsong in order to block communications between Daegu and Busan, where United States Army forces were landing in an attempt to support the collapsing ROK Army.The ROK 23rd Regiment of the ROK 3rd Division was moved to block the advance of the three units at Uljin.The ROK forces mounted a series of delaying actions against the main North Korean force, which was significantly dispersed throughout the mountainous region and unable to muster its overwhelming strength.