Cambodia used postage stamps of Indo-China until the early 1950s. In 1949, Cambodia became associated with French Union but gained independence in 1953 and left the union in 1955. The first stamps were issued in 1951 with Royaume du Cambodge. One of the stamps depicted King Norodom Sihanouk. The National United Front of Cambodia took over Cambodia in 1975 and established Democratic Kampuchea. The new regime allowed no civilian private communication and so abolished the postal system. Service resumed in the early 1979 when the Vietnam People's Army drove the Khmer Rouge out of Phnom Penh. April 1980 saw the first set of postage stamps being issued after the establishment of the People's Republic of Kampuchea.