The Royal Australian Navy Bridging Train was a unique unit of the Royal Australian Navy. It was active only during the First World War, where it served in the Gallipoli and the Sinai and Palestine Campaigns. The Train was formed in February 1915 and stood down in May 1917. Throughout its existence, it was composed of Royal Australian Naval Reservists under the command of Rear Admiral Leighton Bracegirdle . Normally under the command of the British IX Corps, the Train also supported the I ANZAC Corps and Imperial Camel Corps in the defence of the Suez Canal. The Train was Australia's most decorated naval unit of World War I, with more than 20 decorations awarded to its sailors.