The 15th Infantry Division was a military formation of the Korean People's Army during the 20th Century. The division fought in the 1950 Korean War; it took part in the North Korean advance from Seoul to Taejon, and fought in the Battle of Pusan Perimeter. The 15th Division fought along the eastern coast, above Pusan, eventually being annihilated.
References
15th Division (North Korea) Wikipedia(Text) CC BY-SA