Given its location in Oceania, it is impossible for Australasia not to want these lands.
These islands and archipelagos are all part of the Pacific Ocean and serve as important defense lines for Australasia.
If they can obtain these islands, Australasia can build complete island defense chains in the Southwest Pacific region.
With numerous coastal defense guns, powerful warships, and air forces, they can block any enemy coming from the Pacific Ocean, preventing them from ever getting close to the Australasian mainland.
More importantly, these islands encompass the core parts of Australasia (Australia, New Zealand, and New Guinea), making them a solid barrier for the defense of the native land.
If Australasia wants to confront the United States, it must seize these islands. This will ensure that they have the confidence and bargaining power to compete with America before catching up in industry and economy.