The struggle for Egyptian domination over Yemen during the Fāṭimid and Ayyūbid periods (358–648/969–1250)

From the perspective of Yemeni history, between AH 358–648/AD 950–1250, two major states held influence in the medieval Islamic world. The first was the Fāṭimid Caliphate, which established authority over North Africa, Egypt, al-Shām, the Ḥijāz, and Yemen. The second was the Ayyūbid dynasty, which brought an end to Fāṭimid rule and inherited its territories, achieving political supremacy across the same regions. Both dynasties had a profound impact on Yemen, exercising political, military, and cultural hegemony. The first phase of Fāṭimid domination in Yemen commenced with intensive political and religious activities aimed at propagating the Ismāʿīlī daʿwa. Leading dāʿīs such as Ibn Ḥawshab and ʿAlī b. Faḍl were dispatched to the region to spread the Ismāʿīlī doctrine, forging alliances with local tribal groups. This period witnessed conflicts with indigenous dynasties and the emergence of a struggle for regional supremacy. The conquests of ʿAlī b. Faḍl, notably the capture of major urban centers such as Ṣanʿāʾ and Zabīd, consolidated Fāṭimid influence in Yemen. However, internal factionalism and external pressures gradually weakened this authority, leading to the collapse of direct Fāṭimid control. The second phase of Fāṭimid influence was marked by the rise of the Ṣulayḥid dynasty (439–532/1047–1138), which acknowledged Fāṭimid suzerainty. The Ṣulayḥids unified Yemen politically and maintained strong ties with Cairo. Following the death of the founder, ʿAlī b. Muḥammad al-Ṣulayḥī, power passed to his son Aḥmad al-Mukarram, and subsequently to al-Mukarram's wife, Queen Arwā bt. Aḥmad al-Ṣulayḥī. Under their leadership, the Ṣulayḥids preserved political stability and transformed Yemen into the second most important center of the Ismāʿīlī movement after Egypt. Nonetheless, internal disputes and external interventions led to their decline. After the fall of the Fāṭimids, the Ayyūbids, under the command of vii Tūrānshāh, brother of Ṣalāḥ al-Dīn Yūsuf b. Ayyūb, invaded Yemen, establishing Ayyūbid rule and eliminating the Banū Mahdī state as well as local dynasties such as the Zurayʿids and the Banū Hātim. The Ayyūbids sought to centralize governance through newly introduced administrative structures, forging alliances with local tribes while attempting to regulate sectarian tensions. The Ayyūbids' military successes— most notably the capture of strategic cities such as ʿAdan and Ṣanʿāʾ—reshaped the political balance of the region. Through their administrative organization and military campaigns, they profoundly influenced Yemen's social structure and commercial networks.