Venetian–Genoese Wars

The Venetian-Genoese Wars were a series of four major conflicts between the Republic of Venice and the Republic of Genoa. These wars occurred between 1256 and 1381. Both cities were maritime republics located on the Italian peninsula. They functioned as thalassocracies, which are states that derive their power from control of the sea. These conflicts were driven by a desire to dominate lucrative Mediterranean and Black Sea trade routes. The wars were often interrupted by periods of "cold war." During these intervals, piracy and localized violence between the two communities were very common.

To understand these wars, one must look at the economic recovery of Europe starting in the 9th century. As land routes became insecure, trade shifted to the coasts of the Mediterranean Sea. This allowed certain port cities to gain great autonomy and influence. The maritime republics, including Venice, Genoa, Pisa, and others, expanded their reach through the Crusades. They established warehouses, colonies, and commercial establishments in the Levant. These cities provided logistics and soldiers to support crusading efforts. By the 12th century, Venice and Genoa emerged as the most dominant maritime powers.

Venice built its commercial empire through specific legal and territorial gains. In 1082, the Chrysobull gave Venice excellent commercial standing in the Byzantine Empire. After the Fourth Crusade in 1204, Venice became the master of trade in the East. They controlled parts of Constantinople and several Greek islands, such as Crete and the Ionian Islands. Venice managed these lands through a mix of centralized officials called podestà and a network of vassalage. They focused on controlling commercial centers and strategic trade routes across the former Byzantine Empire.

Genoa developed its power through different methods and victories. After defeating the Republic of Pisa between 1118 and 1331, Genoa became a major force. In 1261, the Byzantine Emperor Michael VIII Palaiologos signed the Treaty of Nymphaeum with Genoa. This treaty was a turning point that allowed Genoa to establish influence in the Black Sea. They founded ports like Caffa in the Crimea around 1266. Genoa also controlled territories in Corsica and parts of Sardinia after the Battle of Meloria in 1284. Unlike Venice, Genoese leaders often had more autonomy from their home city.

The first major conflict was the War of Saint Sabas from 1256 to 1270. It began due to a dispute between merchants in the city of Acre. This city was a vital business center on the Levantine coast. Although Venice won several major naval battles, such as those at Settepozzi and Trapani, the war did not destroy Genoa. The conflict ended with the Peace of Cremona in 1270. This peace was mediated by Louis IX of France and Pope Clement IV. While Venice gained power in the Kingdom of Jerusalem, Genoa successfully established its dominion in the Black Sea.

Subsequent wars continued the cycle of rivalry and stalemate. The second conflict occurred from 1294 to 1299 and served as a period of revenge for the Ligurians. In the mid-14th century, the two republics briefly allied against the Mongols during the siege of Caffa in 1346. However, they fought again in the War of the Straits from 1350 to 1355. This third war involved the Kingdom of Aragon and ended in a stalemate. The fourth and final major conflict was the War of Chioggia from 1377 to 1381. During this war, the Genoese navy reached the entrance of the Venetian Lagoon. Venice achieved a final victory through an enormous war effort, saving its city from destruction.

Ultimately, the era of intense fighting between these two rivals came to an end. By the 15th century, both republics faced much larger external threats. Genoa faced pressure from Aragon and eventually became subject to the Kingdom of Spain. Venice faced a centuries-old, exhausting conflict with the Ottoman Empire. The threat posed by the Ottoman Sultan and Barbary pirates actually encouraged Venice and Genoa to collaborate. They worked together in significant events like the Battle of Lepanto. Furthermore, the Age of Discovery changed world trade patterns. As trade moved away from the Mediterranean, the commercial dominance of these Italian republics declined.