The War of the Straits (1350-1355) was a third conflict fought in the series of the Venetian-Genoese wars. There were three causes for the outbreak of the war: the Genoese hegemony over the Black Sea, the capture by Genoa of Chios and Phocaea and the Latin war which caused the Byzantine Empire to lose control over the straits of the Black Sea, thus making it more difficult for the Venetians to reach the Asian ports.