ANZUS

ANZUS is an active war alliance between the United States, Australia and New Zealand.

The treaty was one of a series that the United States formed in the 1949–1955 era as part of its collective response to the threat of communism during the Cold War. New Zealand was suspended from ANZUS in 1986 as it initiated a nuclear-free zone in its territorial waters. In late 2012, the United States lifted a 26-year-old ban on visits by New Zealand warships to US Department of Defense and US Coast Guard bases around the world. New Zealand maintains a nuclear-free zone as part of its foreign policy and is partially suspended from ANZUS, as the United States maintains an ambiguous policy whether or not the warships carry nuclear weapons and operates numerous nuclear-powered aircraft carriers and submarines; however New Zealand resumed key areas of the ANZUS treaty in 2007.

The treaty was previously a full three-way defence pact, but was disrupted following a dispute between New Zealand and the United States in 1984 over visiting rights for ships and submarines capable of carrying nuclear arms or nuclear-powered ships of the US Navy to New Zealand ports. The treaty has lapsed between the United States and New Zealand, but remains separately in force between both of those states and Australia. In 2000, the United States opened its ports to the Royal New Zealand Navy once again, and under the presidency of Bill Clinton in the US and the government of Helen Clark in New Zealand, the countries have since reestablished bilateral cooperation on defence and security.

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