YEMEN (AD 897–1173},{AD 1229–1546},{AD 1635–1872},{1918–) State Muslim (until 1962 Imamate, then the kingdom, republic since 1962). (Arose in the territory of Yemen as a result of separation from the Abbasid Caliphate. Conquered by State of Ayyubid},{Restore the independence. Conquered by the Ottoman Empire},{Restore the independence. Conquered by the Ottoman Empire},{Restore the independence). Capital — Sana