It was the Western Anatolia
that was not under the control of Arab after the death of Muhammad within
10 years. Western Anatolia was under the control of Byzantine. The
Byzantine were mostly Greek speaking people and that’s why Anatolia were also
Greek speaking. Anatolia was traditionally considered as the extension in
the East to the line between Gulf of Iskenderun up to the black sea. Despite
the under ruling problem of the Byzantine, they were still able to hold
Anatolia.