Editor says, what if Trapezuntian emperor Alexios I had re-unified the Byzantine successor states? Please note that the opinions expressed in this post do not necessarily reflect the views of the author(s).
Editor says, in authoring this post we have repurpose content from Wikipedia which reports ~ the Siege of Sinope in 1214 was a successful siege and capture of Sinope by the Seljuq Turks under their Sultan, Kaykaus I.
 Beginning with Fallmerayer, earlier scholars used to place the death of David Komnenos, Alexios' younger brother and co-founder of the Trapezuntian empire, during the siege of Sinope. Modern research, however, has shown that he died in exile as a monk in Mount Athos in 1212/1213
 According to the Byzantinist Warren Treadgold, the loss of Sinope on the one hand "shielded Trebizond from further attacks from Nicaea", but also meant that "henceforth Alexios' claim to be Byzantine emperor rang hollow, and the Empire of Trebizond ceased to be of more than local importance". Editorial comments are entered in [light green] typeface.