According to James Bruce, Newaya Krestos was present at his father's campaign against Salih, the king of Mora and Adal, which took place after Amda Seyon had put down the rebellion of Sabr ad-Din I of Ifat.
Due to lack of support from his subjects, Ali ad-Din's revolt was unsuccessful, and he was captured with all of his sons, effectively destroying the Sultanate of Ifat as an independent state.
They turned to the Ethiopian Emperor Newaya Krestos for help, but in a series of engagements Sultan Haqq ad-Din II defeated their combined army, and his uncle Mola Asfah was killed in battle.
)[6] Taddesse Tamrat notes that while this new location helped preserve Ifat's autonomy, it had a cost in that it gave up all of the dynastic political influence over Shewa and the neighboring Muslim kingdoms of Dawaro, Hadiya and Bale.
[7] Despite his earlier actions against the Ethiopian Church, towards the end of his reign he aggressively helped the Patriarch of Alexandria Mark IV, who had been imprisoned by Al-Salih, the Sultan of Egypt.