The ship saw extensive action during the First Balkan War in 1912–1913, including the battles of Elli and Lemnos in December 1912 and January 1913, respectively. During the latter engagement, she was badly damaged by a Greek shell and forced to withdraw. Following the outbreak of World War I in 1914, "Mesudiye" was moored at Nara to protect the minefields that blocked the entrance to the Dardanelles. On the morning of 13 December, the British submarine passed through the minefields and torpedoed "Mesudiye", which quickly sank. Most of the crew survived, however, and many of her guns were salvaged and used to strengthen the defenses of the Dardanelles. A battery of these guns, named Mesudiye in honor of the ship, helped to sink the French battleship in March 1915.