position at Toma with shells; it was the first time the RAN had fired upon an enemy and had shelled an inland location. On 17 September, German New Guinea surrendered to the encroaching ANMEF, with the overall campaign a success and exceeded the objectives set by the War Office. However, the RAN submarine HMAS AE1 became the first ever vessel of the new navy to be sunk. The Australian Squadron was placed under control of the British Admiralty, and was moreover tasked with protecting Australian shipping. On 1 November, the RAN escorted the first Australian Imperial Force convoy from Albany, WA and set for the Khedivate of Egypt, which was soon to become the Sultanate of Egypt. On 9 November, HMAS Sydney began hunting for SMS Emden, a troublesome German coastal raider, which Sydney later destroyed. Following the almost complete destruction of the East Asia Squadron in the Battle of the Falklands by the Royal Navy, the RAN became able to be reassigned to other naval theatres of the war. Atlantic and Mediterranean On 28 February 1915, the Royal Australian Naval Bridging Train (RANBT) was formed with members of the Royal Australian Naval Reserve who could not find billets in the RAN. Following the entrance of the Ottoman Empire in alliance with the Central Powers, HMAS AE2 was committed to the initial naval operation of the Gallipoli campaign. After the failure of the naval strategy, an amphibious assault was planned to enable the Allies' warships to pass through the Dardanelles and capture Constantinople. The RANBT was sent ashore, along with the invasion, for engineering duties. Later in the war, most of the RAN's major ships operated as part of Royal Navy forces in the Mediterranean and North Seas, and then later in the Adriatic, and then the Black Sea following the surrender of the Ottoman Empire. Interwar years In 1919, the RAN received a force of six destroyers, three sloops and six submarines from the Royal Navy, but throughout the 1920s and early 1930s, the RAN was drastically reduced in size due to a variety of factors including political apathy and economic hardship as a result of the Great Depression. In this time the focus of Australia's naval policy shifted from defence against invasion to trade protection, and several fleet units were sunk as targets or scrapped. By 1923, the size of the navy had fallen to eight vessels, and