sentences:  The now-Ottoman ships saw extensive service during the First Balkan War, providing fire support to Ottoman ground forces fighting in Thrace, as well as engaging the Greek fleet at the Battles of Elli and Lemnos in December 1912 and January 1913, respectively.Following the outbreak of World War I, the German ships were reactivated for use as guard ships protecting the German North Sea coast.The Ottoman vessels meanwhile were used to support the fortresses guarding the Dardanelles during the Dardanelles campaign against British and French forces.