The Australia & New Zealand role in the Pacific War 1941-1945

Question

On the morning of December 7, 1941, aircraft and midget submarines of the Imperial Japanese Navy began a surprise attack on the US Pacific fleet of Pearl Harbor.

How did the attack of Pearl Harbor impact to Australia and New Zealand?

Answer 1

Both New Zealand and Australia came to realize that the strategic and military role of the United States was as crucial in their area as it had been in Europe; and both accepted the challenge to participate in bringing about an improved postwar pattern in the Pacific.

Their self-discovery and determination not to be overlooked was embodied in the Canberra Pact of 1944.