Al-Hasan bin Badr ad-Din came from the same family as imam al-Hadi Yahya (d.
Politically, these years were the low ebb of Zaidi fortunes, since the Rasulids were in strong ascendancy.
Al-Mansur al-Hasan had to stay for much of his time in Sa'dah, the traditional stronghold of the imams in the far north.
He wrote a long urjuzah poem about the imams of the Prophet's family, up to his own days, adding a comprehensive commentary called Anwar al-yaqin.
[3] After the imam's death in Rughafa in 1271, al-Muzaffar Yusuf renewed the Rasulid push towards the north of Yemen.