The Australian Navy's first flagship, the battle cruiser HMAS Australia (I) was the centrepiece of the 'Fleet Unit', whose acquisition signalled the RAN's arrival as a credible ocean-going force. The Commonwealth Government decided upon the name Australia, and it proved a popular choice, carefully avoiding any suggestion of favouritism towards any one Australian State. Notwithstanding some construction delays, John Brown delivered Australia £295 000 under budget. Following successful gun, torpedo and machinery trials she commissioned as an Australian unit at Portsmouth, England, on 21 June 1913 under the command of Captain Stephen H. Radcliffe, RN. Two days later the ship hoisted the flag of Rear Admiral George Edwin Patey, MVO (later Vice Admiral Sir George Patey, KCMG, KCVO), who had been selected to command the Australian Fleet. In company with the new light cruiser HMAS Sydney (I), Australia sailed from Portsmouth on 21 July 1913, and their voyage home was seen as a further opportunity to stimulate public awareness and naval sentiment around the British Empire. Arrangements were made at the first opportunity for the flagship to visit many of the principal Australian ports. On the outbreak of World War I Australia (I) operated (with other ships of the Australian Fleet) as a counter to the German East Asiatic Cruiser Squadron under Admiral Graf von Spee. On 11 November 1918, the signing of the Armistice brought the fighting in Europe to an end. On 21 November, the Grand Fleet came out from the Firth-of-Forth in two divisions to meet the German High Seas Fleet steaming across the North Sea to be interned at Scapa Flow. Australia (I) had the honour of leading the port line at the head of her squadron. After returning home Australia (I) resumed the role of RAN flagship. A year later she played the leading part in the naval activities associated with the visit of the Prince of Wales in HMS Renown, but her time was rapidly running out. In November 1921 she returned to Sydney and the following month was paid off into reserve on 12 December 1921. Less than three years later she was prepared for scuttling to comply with the terms of the Washington Naval Treaty of 1922, which provided for a reduction in naval strengths. The RAN had already removed some of the ship's equipment for use in other warships, and now began the deliberate scrapping of Australia (I) by extracting piping and other small fittings. She was towed to sea by tugs and sunk along with her main armament in position 095 degrees, 24 miles from Inner South Head, Sydney, on 12 April 1924. Extracts from http://www.navy.gov.au/HMAS_Australia_(I)Teak frame photograph Metal Plaque on frame: HMAS Australia First flagship of the Royal Australian Navy 1913-1920 Sunk under terms of the Washington Treaty 12th April 1924 navy, world war one, australia, war, wwi, flagship, hmas australia, ran