WI the church was reunited in the Council of Florence?

The Byzantine emperor just needed catholic support against the turks heatens.The union was actually signed by the patriach of Constantinople, but, in pratice, it never was accepted by the eastern autorities. But, WI the churches were really reunited? Early Ottoman Wars? The Roman Empire could have survived?
 

Philip

Donor
The empire, maybe, but why not a Byzantine rump state along the Dardanelles...

Why not? The Ottomans are not going to let a rump Byzantium sit in the middle of their lands.

Look at the Crusade of Varna. It happened just after the Council of Florence. What more could the West have done?
 
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