The Battle of Preveza was a naval engagement that occurred on 28 September 1538 near Preveza in the Ionian Sea in northwest Greece, in the same area as the Battle of Actium in 31 BC. The battle was between an Ottoman fleet, led by Kapudan Pasha Hayreddin Barbarossa, and a Holy League of Venetian and Hispano-Imperial composition, led by Genoese admiral Andrea Doria. It was part of both the Ottoman–Habsburg wars and the Ottoman Venetian War of 1537-1547. It ended with the Holy League defeated by the Ottomans despite its enormous advantage in numbers and tonnage.