Australia works with the United States and New Zealand.
Australia . The neighbouring countries are Papua New Guinea , Indonesia and East Timor to the north ; the Solomon Islands and Vanuatu to the north-east ; and New Zealand to the south-east . Australia is a member of the United Nations , G20 , Commonwealth of Nations , ANZUS , Organisation for Economic Co-operation and Development ( OECD ) , World Trade Organization , Asia-Pacific Economic Cooperation , and the Pacific Islands Forum .