The Kingdom of the Bosphorus was a greek Kingdom in Crimea and Southern Ukraine,but it later became a Roman client state.I like to define it the "Northern Rome",but it got destroyed before the Byzantine and Western Empire were created (i think).What if it had been able to survive to the Ostrogoth Migrations?Would it have became a Byzantine ally?How long could have it survived?Would it be viewed as a roman successor state?Would it have developed a roman/greek language of its own?