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The founding of the United States of America can be variously dated from the British colonial period or the Revolutionary War.

The formal Declaration of Independence was announced on July 4, 1776. The Treaty of Paris, which acknowledged the US victory in the Revolutionary War, was signed on September 3, 1783.

The adoption of the US Constitution, the basis for the current national government, was on September 17, 1787. It was considered ratified by the vote of the 9th state, New Hampshire, on June 21, 1788, and by the 13th state, Rhode Island, on May 29, 1790. The new US government began its operation on March 4, 1789.

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14y ago

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