At the outbreak of World War I Austria-Hungary had four modern light cruisers and twenty modern destroyers at their disposal, constructed in the early 20th century to defend their growing overseas interests. It was these fast light vessels, not the fleet's prized battleships, which saw most action during the war; from the bombardment of enemy batteries during the Montenegrin Campaign to their victory over the Allied fleet at the Battle of the Strait of Otranto in 1917.