Mansur ad-Din of Adal
On the death of his brother Sabr ad-Din II, Mansur resumed the war against the Ethiopian Empire. He was able to defeat imperial Ethiopian forces under Emperor Yeshaq I at Yedaya, the imperial seat of the region. He then advanced to Mukha mountain (or Moha), where 30,000 imperial soldiers were besieged for two months before a truce was declared. The soldiers were given the choice of either embracing Islam or returning home, of which about 10,000 were said to have converted to Islam, while the remainder returned home. Soon after in 1424, however, Emperor Yeshaq sent a sizable army and defeated him, capturing both Mansur and his brother Muhammad, keeping them imprisoned until they died and once again bringing Adal under Ethiopian rule.