The Australia, New Zealand, United States Security Treaty (ANZUS or ANZUS Treaty) is the 1951 collective security agreement which binds Australia and New Zealand and, separately, Australia and the United States, to co-operate on military matters in the Pacific Ocean region, although today the treaty is taken to relate to conflicts worldwide. It provides that an armed attack on any of the three parties would be dangerous to the others, and that each should act to meet the common threat.