1375—John V gives Tenedos to the Venetians. The Genoese come into conflict with the Venetians over economic privileges at Constantinople.
1379-81—Venice and Genoa go to war over the question of Tenedos and the Byzantine succession to the throne. In the Peace of Turin, it is provided that Tenedos remain unfortified, and that Andronicus IV be recognized the heir to John V.
1386—Genoese make treaty with Byzantines.
1387—Genoese make commercial treaty with Osmanlis.
1388—Venetians make commercial treaty with Osmanlis.
1389—Venice and Genoa renew treaties with Bayezid.
1393—Venice decides to treat with Sigismund of Hungary for defensive alliance against Osmanlis.
1396—Venetian aid in Nicopolis crusade is half-hearted.
1397—Venice urges Genoese of Pera not to treat with Bayezid, and makes accord with Genoa to aid Byzantines.
1401—Venice and Genoa engaged in another sea struggle for supremacy in the Levant.