Venice–Genoa Maritime Competition

Timeline

1. 1294Adriatic Sea · Adriatic SeaConflicts of interest over Black Sea and Levantine trade routes intensified, and war formally broke out in 1294. Genoa intercepted Venetian merchant ships in the Adriatic, while Venice mobilized its fleet to protect eastern trade routes; the war quickly escalated from commercial disputes into full-scale naval warfare.
2. 1298Curzola · DalmatiaIn the Battle of Curzola in September 1298, the Genoese fleet under Lambaldo Doria heavily defeated Venice, capturing thousands of Venetians including Marco Polo. This was the most famous single naval battle of the 1290s rivalry, a decisive tactical victory for Genoa.
3. 1299Milan · LombardyThe prolonged naval warfare was enormously costly, and the two sides made peace in 1299 under the auspices of the Archbishop of Milan. Though Venice suffered a disastrous defeat at Curzola, it maintained its trading presence through overall economic strength and its network of eastern colonies; Genoa's short-term maritime advantage proved difficult to convert into lasting dominance, and the rivalry continued into the 14th century.