Helped us in two world wars can't ask more than that .
Indeed. And what's more, unlike our so called "greatest ally" they didn't wait in WW I until 1917, or in WW II until they were attacked by the Japanese over two years later before backing us up. On Sept 3 1939 Prime Minister Menzies speech was unequivocal
"Fellow Australians,
It is my melancholy duty to inform you officially that in consequence of a persistence by Germany in her invasion of Poland, Great Britain has declared war upon her and that, as a result, Australia is also at war.
No harder task can fall to the lot of a democratic leader than to make such an announcement.
Great Britain and France with the cooperation of the British Dominions have struggled to avoid this tragedy. They have, as I firmly believe, been patient. They have kept the door of negotiation open. They have given no cause for aggression.
But in the result their efforts have failed and we are therefore, as a great family of nations, involved in a struggle which we must at all costs win and which we believe in our hearts we will win."
and
"There can be no doubt that where Great Britain stands, there stands the people of the entire British world. Bitter as we all feel at this wanton crime, this is not a moment for rhetoric … I know that in spite of the emotions we are all feeling, you will show that Australia is ready to see it through. May God in his mercy and compassion grant that the world may soon be delivered from this agony."