Banu Mahdi's state in Yemen

The state of Ali ibn Mahdi al-Himyari and his sons in Yemen. It began with the call of the preacher Ali ibn Mahdi, and died out when the Ayyubids came and took Yemen. ¹

The people of the mountains allied with him after the death of Umm Fatik in 545 AH, and his affair became known. He took Tihama and its mountains, and overcame the Banu Najah in Zabid, taking it in 554 AH. ¹

Ibn Khaldun says that the kingship of the Banu Sulayman was lost from all of Tihama, the mountains and Yemen at the hands of the Banu Mahdi. ¹

A second source is needed: the year the state came to an end is not recorded in the data.