Page "History of Yemen" Paragraph 16

Kaleb sent a fleet across the Red Sea and was able to defeat Dhu Nuwas, who was killed in battle according to an inscription from Husn al-Ghurab, while later Arab tradition has him riding his horse into the sea.

Kaleb installed a native Himyarite viceroy, Sumyafa ' Ashwa ', who ruled until 525, when he was deposed by the Aksumite general ( or soldier and former slave ) Abraha with the support of disgruntled Ethiopian soldiers.

According to the later Arabic sources, Kaleb retaliated by sending a force of 3, 000 men under a relative, but the troops defected and killed their leader, and a second attempt at reigning in the rebellious Abraha also failed.

Later Ethiopian sources state that Kaleb abdicated to live out his years in a monastery and sent his crown to be hung in the Church of the Holy Sepulchre in Jerusalem.

While uncertain, it seems to be supported by the die-links between his coins and those of his successor, Alla Amidas.

An inscription of Sumyafa ' Ashwa ' also mentions two kings ( nagaśt ) of Aksum, indicating that the two may have co-ruled for a while before Kaleb abdicated in favor of Alla Amidas.