أحمد بن يحيى
Upon the knowledge of the murder of Imam Yahya, Yemeni tribes rallied behind Sayf-ul-Islam Ahmad bin Yahya and accepted him as the new Imam of Yemen. The armies surrounded Sanaa under the leadership of Seif Ul Islam Alhassan and Seif Ul Islam Alabbass, both sons of the late Imam, supported by their brother Seif Ul Islam Yahya from within the city walls.