The 766th Independent Infantry Regiment () was an elite light infantry unit of North Korea's Korean People's Army (KPA) that existed briefly during the Korean War. It was headquartered in Hoeryong, North Korea, and was also known as the 766th Unit (). Trained extensively in amphibious warfare and unconventional warfare, the 766th Regiment was considered a commando unit. The regiment was trained to conduct assaults by sea and then to lead other North Korean units on offensive operations, to infiltrate behind enemy lines, and to disrupt enemy supplies and communications. Activated in 1949, the regiment trained for more than a year before the outbreak of the war on June 25, 1950. On that day, half of the regiment led North Korean forces against South Korean troops by land and sea, pushing them back after several days of fighting. Over the next six weeks, the regiment advanced slowly down the Korean Peninsula, acting as a forward unit of the North Korean army. Suffering from a lack of supplies and mounting casualties, the regiment was committed to the Battle of Pusan Perimeter as part of a push to force United Nations (UN) troops out of Korea. The regiment saw its final action at the Battle of P'ohang-dong, fighting unsuccessfully to take the town from U.N. troops. Racked by U.N. naval and air forces and suffering extensive losses from continuous fighting, the regiment was forced to retreat from the P'ohang-dong battlefield. It moved north, joining a concentration of other KPA units, before being disbanded and absorbed into the KPA's 12th Division. Organization Upon creation, the 766th Unit was designed to vary in size, consisting of a number of smaller units capable of acting alone. Eventually, it was reinforced to the size of a full regiment, with 3,000 men equally distributed across six battalions (numbered 1st through 6th). It was made directly subordinate to the KPA Army headquarters and put under the command of Senior Colonel Oh Jin Woo, who would command the unit for its entire existence. All 500 men of the 3rd Battalion were lost just before the war started when their transport was sunk while attacking Pusan harbor by the Republic of Korea Navy. For the remainder of its existence the regiment was whittled down by losses until it numbered no more than 1,500 men and could not muster more than three battalions. History Origins During the planning for the invasion