HMS Agamemnon was one of two pre-dreadnought battleships launched in 1906 and completed in 1908. She was the Royal Navy's second-to-last pre-dreadnought battleship to be built, followed by her sister ship, . She was assigned to the Channel Fleet when the First World War began in 1914. The ship was transferred to the Mediterranean Sea with Lord Nelson in early 1915 to participate in the Dardanelles Campaign. She made a number of bombardments against Turkish fortifications and in support of British troops. Agamemnon remained in the Mediterranean after the conclusion of that campaign to prevent the German battlecruiser and light cruiser from breaking out into the Mediterranean. Agamemnon shot down the German Zeppelin LZ-55 (LZ-85) during a bombing mission over Salonica in 1916. On 30 October 1918, the Ottoman Empire signed the Armistice of Mudros on board the ship while she was anchored at Lemnos in the northern Aegean Sea. She was converted to a radio-controlled target ship following her return to the United Kingdom in March 1919 and began service in 1921. Agamemnon was the last pre-dreadnought in service with the Royal Navy; she was replaced by at the end of 1926 and sold for scrap in January 1927. Construction and description HMS Agamemnon was ordered in 1904 and was the first warship built by the William Beardmore and Company's Dalmuir Naval Construction Works. She was laid down on 15 May 1905 and launched on 23 June 1906 before the dockyards themselves were finished. Her completion was greatly delayed by labour troubles and by the diversion of the 12-inch (305 mm) guns intended for her to expedite completion of , and she was not finally completed until June 1908, six months before her sister Lord Nelson. Agamemnon displaced at deep load as built, with a length of , a beam of and a draft of . She was powered by two inverted vertical triple expansion four-cylinder steam engines, which developed a total of and gave a maximum speed of . The ship was armed with four BL 12-inch Mk X guns arranged in two twin gun turrets, one each fore and aft. Her secondary armament consisted of ten BL 9.2-inch Mk XI guns, in twin gun turrets on each corner of the superstructure, and a single gun turret between them, plus 24 QF 12-pounder 18 cwt guns. She also mounted five submerged torpedo tubes, for which 23 torpedoes were