Italian protected cruisers served in many roles across the globe. Many were deployed to Italy's colonies in Africa, or to foreign stations in the Americas and Asia to show the flag. They were also assigned to the main fleet in the Mediterranean, where they served as scouts. As the vessels aged, many were converted for secondary duties, becoming training ships, depot ships, and headquarters ships. Many of the early vessels saw action during the Italo-Turkish War, bombarding Ottoman positions in North Africa and the Arabian Peninsula and blockading ports in the Red Sea. During World War I, most of the vessels saw little action, owing to the cautious strategy adopted by both Italy and Austria-Hungary, but Quarto battled an Austro-Hungarian cruiser in 1915 and Marsala took part in the Battle of the Strait of Otranto in May 1917. After the war, most of the remaining vessels were scrapped or reduced to secondary roles, having been supplanted by ex-German and Austro-Hungarian vessels taken as war prizes and newer light cruisers built in the 1920s.