 When the North Koreans approached the Pusan Perimeter on August 5 , they attempted the same frontal assault technique on the four main avenues of approach into the perimeter . Throughout August , the <unk> 6th Division , and later the <unk> 7th Division engaged the US 25th Infantry Division at the Battle of <unk> , initially <unk> a UN counteroffensive before <unk> with battles at <unk> @-@ <unk> and Battle Mountain . These attacks stalled as UN forces , well equipped and with plenty of reserves , repeatedly repelled North Korean attacks . North of <unk> , the <unk> 4th Division and the US 24th Infantry Division <unk> in the <unk> <unk> area . In the First Battle of <unk> <unk> , the North Korean division was unable to hold its bridgehead across the river as large numbers of US reserve forces were brought in to repel it , and on August 19 , the <unk> 4th Division was forced back across the river with 50 percent casualties . In the <unk> region , five North Korean divisions were repulsed by three UN divisions in several attempts to attack the city during the Battle of <unk> . Particularly heavy fighting took place at the Battle of the <unk> <unk> where the <unk> 13th Division was almost completely destroyed in the attack . On the east coast , three more North Korean divisions were repulsed by the South Koreans at P 'ohang @-@ dong during the Battle of P 'ohang @-@ dong . All along the front , the North Korean troops were <unk> from these defeats , the first time in the war their strategies were not working . 
