RAAF motto

[Dilbert]

Ad adura ad astra
through struggles to the stars

 

[senojekips]

You'd better correct that pronto, young Dilbert. Or you may never live to see the RAAF.

It's "Per Ardua Ad Astra"

 

[Redleg]

Hm, that's the same motto as the RAF
http://www.military-quotes.com/mottos/UK.htm

I'll add that one to the Australian Mottos page the next time I update it:
http://www.military-quotes.com/mottos/australia.htm

 

[AFSteliga]

And it also means 'Through Adversity to the Stars', exactly the same for the Canadian Air Force.