Eskişehir Osmangazi Üniversitesi Tarih Dergisi, cilt.5, sa.2, ss.54-67, 2022 (Hakemli Dergi)
In the 13th century, a crisis emerged in Anatolia deriving from the Mongol
invasion. The devastation of the Seljuk rule led to a power vacuum in Anatolia,
and the Ottomans existed as a small principality in such a milieu. The Ottomans
desired to expand their control from the beginning and become a major power in
the region in a short time. The direction of the Ottomans was Byzantine, so; they
raided Byzantine lands. The Latin invasion of Constantinople had devastated the
empire, and it could never regain its strength. In time, the Ottoman raids were
systematically replaced by sieges of the cities. Even the Ottomans started to pose
a threat to Constantinople. As the Ottomans maintained their advance, the
Byzantine Empire tried to protect, but the Byzantine Empire was aware that it
could not be dealt with the Ottomans unless support was provided. The remedy
for this situation was the West, but there was a separation between East and West.
To protect the Byzantine Empire, the unification of the churches came to the fore,
and the Council of Ferrara-Florence gathered. However, the short-lived
unification led the chaos in the Patriarchate. Finally, the attempts failed, and the
conquest of Constantinople brought the Byzantine Empire to an end