 Around 04 : 00 on June 25 , the KPA 's 5th Division began its first attacks on the ROK 10th Regiment 's forward positions . Three hours later , the 766th Regiment 's two battalions landed at the village of Imwonjin , using motor and sail boats to land troops and <unk> South Korean villagers to assist in setting up supplies . The two battalions separated ; one headed into the T <unk> Mountains and the second advanced north toward <unk> . At this point , the ROK 8th Division , under heavy attack from the front and aware of attacks in the rear , urgently requested reinforcements . It was denied these reinforcements , as ROK higher commanders informed the division commander that the ROK Army was under heavy attack across the entirety of the 38th parallel and had no reinforcements to spare . 
