Operations Plan 5027
Operations Plan 5027 (OPLAN 5027) are a series of military operations plans made by the United States and South Korea for the defense against a possible North Korean invasion. == History == Before 1973, OPLAN 5027 was primarily focused on defeating a North Korean invasion, with a 50-mile retreat from the penetrated Demilitarized Zone to positions south of the Han River (known as the Hollingsworth Line).