Map of the Eastern and Western Roman empires around 330 CE. Areas belonging to the Western Roman Empire include Britain, Gaul, Spain, Italy, and sections of Northern Africa. The city of Rome is labeled in the Western Roman Empire. Areas belonging to the Eastern Roman Empire include Thrace, Macedonia, Greece, and Egypt. The cities of Constantinople and Anatolia are labeled in the Eastern Roman Empire. The Western and Eastern Roman empires encircle the Mediterranean Sea. The Black Sea borders the northeastern area of the Eastern Roman Empire. Which of the following regions did not become part of the Byzantine Empire?

Thrace
Italy
Egypt
Britain