The prospect of a global nuclear war reared its head following the detonation of the first two nuclear weapons at the end of World War II, in 1945. However, the process of changing the flags was incomplete when the Great War took place on 23 October 2077, hence flags surviving after the war are a mixture of both types.ДЄ chart showing the known information about the Vault-Tec vaults. In 2076 the flag was adjusted to incorporate a thirteenth external star to represent the annexed territory of Canada. The flag of the United States was adjusted after 1969 to show a single, central star representing the Columbia Commonwealth as the centre of American power and twelve other stars encircling it. There is little information available on why and how the Commonwealths were unified, their centres of administration or how they interacted with either the States below them or the federal government above them. New England: Connecticut, Rhode Island, Massachusetts, Vermont, New Hampshire, Maine.Eastern Commonwealth: West Virginia, Delaware, Pennsylvania, New York, New Jersey.Columbia: Virginia, Maryland, District of Columbia.Southeast Commonwealth: Georgia, North Carolina, South Carolina.Gulf Commonwealth: Louisiana, Alabama, Mississippi, Florida.East Central Commonwealth: Ohio, Tennessee, Kentucky.Great Midwest Commonwealth: Minnesota, Wisconsin, Illinois, Indiana, Michigan.Plains Commonwealth: Nebraska, Missouri, Oklahoma, Kansas, Iowa.Four States Commonwealth: Utah, Colorado, Arizona, New Mexico.Northern Commonwealth: Montana, Wyoming, North Dakota, South Dakota.Southwest Commonwealth: Southern California, Nevada, Hawaii.Northwest Commonwealth: Washington, Oregon, Idaho, Northern California, Alaska.The Commonwealths were organised as follows: Politically, a major change was the unification of the American states into the Thirteen Commonwealths in 1969, an intermediary step between the US federal government and the individual states. The transistor was not adopted for widespread electronic use, with vacuum tubes instead continuing to be the primary technology used in televisions and computers, which remained far bulkier, slower and less powerful than in our world, at least until the development of AI in the mid-21 st Century. In the alternate history of the Fallout universe, history diverged from our own shortly after the end of World War II. A map showing the Thirteen Commonwealths of the United States of America.

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