Original sentence: As Bahr negus, Yeshaq ruled a territory north of the Tekezé River in present day Ethiopia as far as the Red Sea in Eritrea, making him the second most powerful political figure in the Empire during his lifetime.Bahr negus Yeshaq (died 1578) was Bahr negus of Ethiopia during the mid to late 16th century
Edited sentence: As Bahr negus, Yeshaq ruled at most, a territory north of the Tekezé River in present day Ethiopia as far as the Red Sea in Eritrea, making him the second most powerful political figure in the region during his lifetime.Bahr negus Yeshaq (died 1578) was a Bahr negus, or King in the cultural realm of medieval Abyssinia.This could also mean that the "province" was not within the realm of control of the then "Emperor"