several months, the two ships alternated trips to Constantinople. On 25 April, the two battleships bombarded the British landings on the first day of the Gallipoli Campaign. After firing fourteen shells, the fifteenth detonated in the right gun barrel in the center turret, destroying the gun. After a shell exploded inside one of s guns in early June, both battleships were withdrawn. On 7 August, the British landed more troops at Suvla Bay, prompting the high command to send to support the Ottoman defenses there. In addition, she was loaded with a large quantity of ammunition to resupply the Fifth Army fighting in the Gallipoli Campaign. The next day, while she was en route to the area with only a single torpedo boat as escort, she was intercepted by the British submarine off Bolayır in the Sea of Marmara. The submarine hit with a single torpedo; she capsized seven minutes later, but remained afloat for a few minutes before she slipped below the waves. The ship sank with the loss of 21 officers and 237 men. The rest of the crew were picked up by her escort and a second torpedo boat patrolling the area. Footnotes Notes Citations References Further reading Brandenburg-class battleships Ships built in Wilhelmshaven 1891 ships Boxer Rebellion Barbaros Hayreddin Ships sunk by British submarines World War I shipwrecks in the Dardanelles Maritime incidents in 1915