The purchase added to the United States a region very different from others on the American the United States first had to explore and then populate it. 26, 1837. NOTE: The admission of Michigan into the Union on equal footing with the original states concluded a long and bitter battle. Montana was the 41st state to be admitted into the Union on November 8, 1889. the delegates to the First Legislative Assembly gathered in December of.
8th January 1790: George Washington delivers the first State of the Union address
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