Military

Australia's armed forces — the Australian Defence Force (ADF) — comprise the Royal Australian Navy (RAN), the Australian Army and the Royal Australian Air Force (RAAF), in total numbering 81,214 personnel (including 57,982 regulars and 23,232 reservists) as of November 2015. The titular role of Commander-in-Chief is vested in the Governor-General, who appoints a Chief of the Defence Force from one of the armed services on the advice of the government. In a diarchy, the Chief of the Defence Force serves as co-chairman of the Defence Committee, conjointly with the Secretary of Defence, in the command and control of the Australian Defence Organisation.

In the 2016–2017 budget, defence spending comprised 2% of GDP, representing the world's 12th largest defence budget. Australia has been involved in United Nations and regional peacekeeping, disaster relief, as well as armed conflicts from the First World War onwards.

HMAS Canberra, a Canberra class landing helicopter dock, and HMAS Arunta, an Anzac-class frigate, sailing in formation