 Complete the following phrase:  In 1453 the Ottoman fleet participated in the historic conquests of Constantinople, Gökçeada, Lemnos and Thasos. The conquest of the Duchy of Athens and the Despotate of the Morea was completed between 1458 and 1460, followed by the conquest of the Empire of Trebizond and the Genoese colony of Amasra in 1461, which brought an end to the final vestiges of the Byzantine Empire. In 1462 the Ottoman fleet conquered the Genoese islands of the northern Aegean Sea, which were administered by the Gattilusio family, including their capital Mytilene in the island of Lesbos. This was followed by the Ottoman-Venetian War of 1463-1479. In the following period the Ottoman fleet gained more territory in the Aegean Sea, and in 1475 set foot on Crimea on the northern shores of the Black Sea. Until 1499 this was followed by further expansion on the Black Sea coasts such as the conquest of Georgia in 1479 and on the Balkan peninsula such as the final reconquest of Albania in 1497, and the conquest of Montenegro in 1499. The loss of Venetian forts in Montenegro, near the strategic Castelnuovo, triggered the 