The Byzantine Empire in Decline
By the time the 15th century arrived, the Byzantine Empire was a shadow of its former self. Once the eastern half of the Roman Empire, the Byzantines had seen their power wane over centuries. The empire had been plagued by internal divisions, external threats, and territorial losses. The loss of much of its territory to the Seljuk Turks in the 11th and 12th centuries and the gradual shrinking of its borders over time had left Constantinople isolated. By the 1400s, the Byzantines controlled little more than the city of Constantinople itself and a handful of other territories in Asia Minor and the Balkans.
Despite numerous attempts to revive its fortunes, the Byzantine Empire struggled against a powerful array of enemies, including the Ottomans, who were steadily expanding their empire under the leadership of Sultan Mehmed II. shutdown123