Marxist-Leninist state formed from the former Aden Colony/Protectorate upon British withdrawal on 30 November 1967 (initially the People's Republic of Southern Yemen, renamed the People's Democratic Republic of Yemen in 1970); the Arab world's only Communist-ruled state, aligned with the USSR.
United with the Yemen Arab Republic (North Yemen) on 22 May 1990 to form the unified Republic of Yemen.
The atlas holds 2 border frames for South Yemen (People's Democratic Republic of Yemen) — the shape you scrub through changes in 1967 · 1977.
Dedicated scholarly history of the PDRY as the Arab world's sole Marxist-Leninist state. Open-Library-verified exact title/author match.