The Royal Australian Navy destroyer HMAS Swan was also briefly engaged , carrying out an intelligence gathering mission in the Black Sea in late 1918 . Other Australians served as advisers with the British Military Mission to the White Russian General , Anton Denikin in South Russia , while several more advised Admiral Aleksandr Kolchak in Siberia . Later , they also served in Mesopotamia as part of Dunsterforce and the Malleson Mission , although these missions were aimed at preventing Turkish access to the Middle East and India , and did little fighting .