Greek naval plans were interrupted by the outbreak of World War I in August 1914, however. Work halted on "Vasilefs Konstantinos" in August and on "Salamis" in December 1914. As a result, "Kilkis" and "Lemnos" were the only battleships delivered to Greece. Greece remained neutral for the first three years of World War I, though in October 1916, France seized the Greek Navy and disarmed both of the battleships. They remained inactive for the rest of the war. Both ships saw service in 1919–1922 during the Greco–Turkish War. They continued to serve with the fleet until the early 1930s, when they were reduced to secondary roles. "Lemnos" became a barracks ship while "Kilkis" became a training ship. During the German invasion of Greece in April 1941, both ships were attacked and sunk in Salamis by Ju 87 Stuka dive-bombers. The two old battleships were scrapped after the end of the war.