Original sentence: He lived at the court of Constantinople for many years and learned a great deal about Roman government and military tactics, which served him well when he became the Gothic ruler of a mixed but largely Romanized "barbarian people", so as Oriental kingdoms used to call tribes living on European continet, what we call today Western Europe [Armenian historian Movses Khorenatsi]
Edited sentence: He lived at the court of Constantinople for many years and learned a great deal about Roman government and military tactics, which served him well when he became the Gothic ruler of a mixed but largely Romanized "barbarian people", as Oriental kingdoms used to call tribes living on the European continent, what is presently known as Western Europe [Armenian historian Movses Khorenatsi]