Answer:
Byzantine Empire
Step-by-step explanation:
Byzantine Empire came into existence after the fall of the Roman Empire. The empire preserves the Greek culture as well as the Romans. The need to fight the enemies and stop them from invading continues in both Empires. Both empires ruled over Europe and its territories by having a strong military.
The Eastern Roman Empire became the Byzantine Empire. The Byzantine Empire became rich and flourished because of its location. Its capital, Constantinople, became the centre of a trade route. Constantinople remained powerful and wealthy because of the strong military while cities in the Western Roman Empire crumbled.
The Ottoman Turks were responsible for the siege of Constantinople in 1453 that lead to the Fall of Constantinople and end of the Byzantine empire.