On September 1, 1942, a federal judge in Sacramento, California, US, upheld the wartime detention of Japanese-Americans and Japanese nationals during World War II. Learn more about Japanese-American internment.

On September 1, 1951, Australia, New Zealand, and the United States signed ANZUS, a mutual defense accord similar to NATO in Europe. The alliance between the US and New Zealand, however, has been suspended since 1985, after the institution of New Zealand's nuclear-free zone prohibited US nuclear warships from entering New Zealand's ports.