Yemen (1967-1990) SouthEncyclopediaAsiaYemen (1967-1990) SouthPeople's Democratic Republic of Yemen جمهورية اليمن الديمقراطية الشعبية Jumhūrīyat al-Yaman ad-Dīmuqrāṭīyah ash-Sha'bīyah AIR FORCEARMYNAVY