559th Transportation Group

Named for the date (i.e., May 1959) of the Politburo decision creating it, the 559th Transportation Group was a People's Army of Viet Nam unit responsible for the operation of the Ho Chi Minh trail supplying. It was commanded by Dong Sy Nguyen.

Its existence was first learned through communications intelligence. .  Other groups were responsible for sea-based supply of the Communist forces in South Vietnam, as well as for supply of the Pathet Lao.