The Australian armed forces numbered 50,920 active personnel in 2002, including 6,364 women. The army consisted of 25,150; the navy, 12,570; and the air force, 13,200. Reserve forces numbered 20,300 for all three services. Military weapons systems included 71 battle tanks, 6 submarines, and 156 airforce combat aircrafts. Australia contrubuted to peacekeeping missions in East Timor, Ethiopia/Eritrea, Egypt, and the Middle East.
Australia's estimated defense expenditure in 2001–02 was $9.3 billion, 2% of GDP.