 During this time, the unit was expanded in size to 3,000 men in six battalions.Prior to the beginning of the war in June 1950, the 766th completed training and was moved to the front at Yangyang to support the KPA's 5th Division.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.