The 1951 Australia, New Zealand and United States Security Treaty (ANZUS Treaty) is an agreement signed to protect the security of the Pacific.

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Although the agreement has not been formally abrogated, the United States and New Zealand no longer maintain this security relationship between themselves. However, the ANZUS Treaty obligates Australia and the United States to consult on mutual threats and to act to meet common dangers. Australia invoked the ANZUS Treaty for the first time in response to the U.S. terrorist attacks of September 11th.

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The U.S. and Australia are excellent long-term allies. We are strong economic partners and have deep defense/security cooperation between the two countries, with combined training courses, military exercises, and shared intelligence capabilities. This cooperation allows for regional engagement and security and stability in the Indo-Pacific.