Historical Context and Reign
Kaleb succeeded Ousas as ruler of Aksum and was in turn followed by Gebre Meskel. His reign saw a major consolidation of Aksumite authority over the Agaw tribes of Wag and Lasta. According to Cosmas Indicopleustes, Kaleb appointed a governor of Agau who protected the long-distance caravan routes on which the kingdom's commerce depended.
In 530 the Byzantine ambassador and historian Nonnosus met with Kaleb, attesting to the kingdom's diplomatic standing among the great powers of the era. The scholar Stuart Munro-Hay characterized Kaleb's Arabian campaign as 'Aksum's swan-song as a great power in the region,' marking a high point before the kingdom's later decline.