Eritrea, officially the State of Eritrea, is a country in the Horn of Africa region of East Africa. Its capital and largest city is Asmara. The country is bordered by Ethiopia to the south, Sudan to the west, and Djibouti to the southeast. The northeastern and eastern parts of Eritrea have an extensive coastline along the Red Sea. The country has a total area of approximately 117,600 km2 (45,406 sq mi), and includes the Dahlak Archipelago and several of the Hanish Islands.
Hominid remains found in Eritrea have been dated to 1 million years old and anthropological research indicates that the area may contain significant records related to human evolution. The Kingdom of Aksum, covering much of modern-day Eritrea and northern Ethiopia, was established during the first or second century AD.