Principality of Theodoro
Trapezuntine Perateia had already been subjected to pressure from the Genoese and Kipchaks by the time Alexios I of Trebizond died in 1222 before the Mongol invasions began its western sweep through Volga Bulgaria in 1223. With them, control of the peninsula changed in 1238, as all but the Perateia of Crimea was incorporated into the territory of the Golden Horde throughout the 14th century CE. In the course of the 13th century CE, portions were controlled by the Republic of Venice and by the Republic of Genoa, the Perateia soon became the Principality of Theodoro and Genoese Gazaria, respectively.