 The North Korean plan was to conduct amphibious landings in Chongdongjin and Imwonjin on the eastern coast using the 766th Regiment, in conjunction with the 549th Unit.These amphibious landings would harass the rear area of the Republic of Korea Army, providing supporting attacks to the planned frontal attack by the KPA's II Corps directly from the north.The 766th was in position by June 23 and prepared for the attack.