Australian population during ww1?
Around 5 million. 8.5 % of the population enlisted, or 416, 000 men.
No. The Australian Air Force was only formed on 31 March 1921. Approval to use the 'Royal' prefix was granted on 13 August 1921. There were some Australian Flying Corps (AFC) squadrons which joined the British during World War I, but they were not yet designated the title of Royal Australian Air Force.