Why did Australia become involved in World War One

Australian Prime Minister Joseph Cook, 5th August 1914"...when the Empire is at war, so also is Australia.“

Newly appointed Australian Prime Minister Andrew Fisher, September 1914"Should the worst happen ...", Australia would "...rally to the Mother Country ... to help and defend her to our last man and our last shilling."

What do these statements say about Australia’s relationship with Britain?

What happened NextPrime Minister Cook offered to the British 20,000 men from Australia and New Zealand to serve in any destination desired by the British Government.

By the end of 1914 50 000 volunteers had been accepted into service

Who in Australia would be in favour of supporting Britain?

http://www.abc.net.au/news/2011-08-09/interactive-infographics-census-2011-australia-transformed/2829132