Defence Australia is a department of the Government of Australia charged with the responsibility to defend Australia and its national interests. Along with the Australian Defence Force (ADF), it forms part of the Australian Defence Organisation (ADO) and is accountable to the Commonwealth Parliament, on behalf of the Australian people, for the efficiency and effectiveness with which it carries out the Government's defence policy. The head of the department, who leads it on a daily basis, is the Secretary of the Department of Defence (SECDEF), currently Greg Moriarty. The Secretary reports to the Minister of Defence, Richard Marles. History Australia has had at least one defence-related government department since Federation in 1901. The first Department of Defence existed from 1901 until 1921. In 1915, during World War I, a separate Department of the Navy was created. The two departments merged in 1921 to form the second Department of Defence, regarded as a separate body. A major departmental reorganisation occurred in the lead-up to World War II. The Department of Defence was abolished and replaced with six smaller departments – the Defence Co-ordination (for defence policy, financial, and administrative matters), three "service departments" (Army, Navy, and Air), the Supply and Development (for munitions and materiel), and Civil Aviation. The current Department of Defence was formally created in 1942, when Prime Minister John Curtin renamed the existing Department of Defence Co-ordination. The other defence-related departments underwent a series of reorganisations, before being merged into the primary department over the following decades. This culminated in the abolition of the three service departments in 1973. A new Department of Defence Support was created in 1982, but abolished in 1984. In May 2022 the department was renamed Defence Australia. Defence Committee The Defence Committee is the primary decision-making committee in the Department of Defence, supported by six subordinate committees, groups and boards. The Defence Committee is focused on major capability development and resource management for the Australian Defence Organisation and shared accountability of the Secretary and the Chief of the Defence Force. The members of the Defence Committee are: Secretary of the Department of Defence (SECDEF) Chief of the Defence Force (CDF) Vice Chief of the Defence Force (VCDF) Associate Secretary Chief of Navy (CN) Chief of Army (CA) Chief of Air Force (CAF) Chief of Joint Operations (CJOPS) Deputy Secretary for Capability Acquisition and Sustainment Deputy Secretary for Strategic Policy and Intelligence Chief Defence