Adulis

Adulis is mentioned by Pliny the Elder as a port on the Red Sea trading in Ivory, Hides and Slaves.
During the first century CE, King Zoskales ruled Adulis from Aksum, capital of the Aksumite Empire.

Adulis controlled the Pearl fisheries of the Dahlak Archipelago, whose pearls were famous in the Roman Empire, along with its Tortoiseshell.
As the Roman Empire declined, the Aksumite Empire took control of the Trade from India in the southern Red Sea.
The Aksumite Empire used Adulis for its base to exert its Sea Power and in 525 CE it invaded the Himyarite Kingdom from this base.

Adulis, Eritrea