How did contantinople
respond to numerous Invasion attempts before 1453

It fought them off but was weakened

Explanation:

Constantinople remained with the Byzantine until it conquered by the Turks in 1453.

The Ottoman Turks held accountable for the siege of Constantinople in 1453 that direct to the Fall of Constantinople and the Byzantine empire. The reason for the decline of the Byzantine empire was the result of weak rulers and military. The Byzantine Empire was repeated in a war for almost many years, which came to be known as Crusades.

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