Invasion of Australia?
Who would do that? China doesn't want kangaroos or koalas. And they have enough sand in their own deserts as it is.
So why would China invade Australia? Because some crappy author thought it would make a good plot for yet another garbage "young adult" novel series?
As much as I find Red Dawn to be utterly retarded, at least the scenario of someone trying to attack the US during the Cold War (yes, the original Red Dawn, the remake is a pile of horse manure, go figure) is a bit more realistic than anyone with a right mind trying to invade and occupy the Aussies.