The Royal Australian Air Force turns 90 today. It was officially formed as an independent service out of the old Australian Flying Corps on 31 March 1921 (making it three years less one day younger than the Royal Air Force). At first it was just the Australian Air Force: it didn't get the Royal prefix until August, thus becoming the familiar RAAF (usually pronounced 'raff').
Why did Australia plump for an independent air arm? It went very early for this: of the other Dominions, still largely dependent on Britain for defence, Canada waited until 1924, New Zealand until 1934 and South Africa not until
1951 1920. The major powers were similarly unhurried: Italy's air arm went independent in 1923 but France waited until 1933; the United States and Japan didn't do so until after the Second World War.
According to Alan Stephens, The Royal Australian Air Force (South Melbourne: Oxford University Press, 2001), the prime minister, Billy Hughes, was particularly keen on aviation and pushed things along quickly. But there was no strategic theory of independent air power underpinning the precise form this would take. There was little concern about strategic bombing, hardly surprising as the arrival of an aeroplane from anywhere was front page news and potential enemies were many thousands of miles away. So the new air force was intended to be devoted to co-operation with the army and the navy, in support of Imperial defence and the Singapore strategy.
Interservice rivalry and finance were key to the RAAF's actual form. With limited funds available, a single service had the advantage of efficiency, avoiding duplication in flying schools, aircraft repair organisations and other overheads. It also meant that neither senior service would have to see its rival have control over the lion's share of aviation resources. They were happy to see a junior, weak organisation with little real independence, which could be relied upon to support them as needed.
One welcome and immediate result of the new service was jobs, as this list in the Mercury of 31 March shows. (Though there were complaints from ex-AFC men about the pay rates and conditions of employment.) Interestingly, among the usual propeller makers, cooks, machinists and so on, the RAAF declared that it had need of airship riggers and balloon basket makers. As far as I know, the RAAF never operated any airships (or balloons), but I would guess the idea would have been to use them for maritime reconnaissance and anti-submarine warfare.
Otherwise, the formation of the RAAF seems to have excited little interest in the in the Australian press (the most informative article I could find was from the Western Argus of 21 March). The British press paid even less attention: I found nothing in The Times, the Guardian or the Observer, and only one brief article in the 24 March issue Flight. Which strikes me as a bit odd, though perhaps it reflects the insubstantial nature of the shadow of the bomber (and military aviation in general) in Britain during the immediate post-war period.
So: many happy returns, RAAF -- at least until the end of war!