The vast bulk of Australia's cities and population are in the south eastern corner of the country. To land troops in that populated region requires a 5000 mile voyage under a hostile sky dominated by one of the most powerful air forces in the region and avoiding one of the regions most powerful navies.
Regardless of where they land (or try to anyway) the air force and navy will have attritted the hell out of them. Tanks form the core of the heavy 2nd Brigade whose job is to be the armoured fist to smash the landings.
With a very limited air-to-air refueling capability. Take out their few tankers and Durandal their refuel/rearm airfields, and they've got a REAL problem. And Indonesia and Malaysia are a lot closer than 5000 miles, with sizable amphibious assault forces.
Force: 13,953 personnel(plus 2,206 Reserves)
71 Fighters (F/A-18 Hornet)
7+26 Lead in Fighter Trainers (Hawk Mk127)
35 Strike Fighters (21 RF/F-111C, 14 F-111G)
0+7 AEW&C (B737-700 improved)
4/1 Tanker/Transport (B707)
38 Transports (24 Hercules, 14 DHC-4)
19/3 Maritime Patrol/Training (AP-3C/-3B Orion)
TARs:
Indian Ocean
CoralSea
TimorSea
TasmanSea
Basing:
Alice Springs
CairnesRAAF
SchergerRAAF
Tindal
Townsville
Brisbane
OakleyRAAF
Amberley
Sydney
CanberraRAAF
GlenbrookRAAF
RichmondRAAF Williamtown
Queenstown
Melbourne
AdelaideRAAFE
dinburgh
Darwin
Rockingham/Freemantle Air Base
RAAF Pearce
Perth