The correct answer is Aksum
The history of the kingdom of Aksum is related to that of the civilizations that developed in Africa, below Egypt. That is, in the old regions of Nubia and Ethiopia. The vestiges of this kingdom date from the 5th century BC, but its heyday occurred around the middle of the 4th century AD, when the Axumites (name for the inhabitants of Axum) brought their rival Kush kingdom to ruin.
During the 3rd and 4th centuries, Axum conquered territories in the Arabian Peninsula, Northern Ethiopia and part of ancient Persia, becoming one of the most powerful empires of the transition from the Ancient Age to the Middle Ages. Still in the 4th century, the Axumites destroyed the city of Meroe, capital of the Kush empire, fragmenting this ancient political center in southern Egypt. From the defeat of Kush three different kingdoms were born, Nobatia, Makuria and Alodia, which were all under the influence of Axum.
With the vast territory conquered, the kingdom of Axum came to dominate all trade routes that passed through the southern Arabian Peninsula and southern Arabia, through the region of Nubia and Ethiopia, that crossed the Red Sea. He also obtained fertile land that allowed agriculture and grazing for some cattle. To manage and control the trade flow of this region, the kingdom of Axum coined its own currency as well, even establishing trade with India and China.
