July 4th:

1802: The U.S. Military Academy at West Point officially opens.

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First announced by newly-minted president Thomas Jefferson a year earlier, the United States Military Academy (USMA) in West Point, New York, officially opened on July 4, 1802. In its early days, this now-prestigious school got off to a rocky start. There was no strict curriculum or length of study, and the students ranged in age from 10 to 37 years old.

 

oh and the Great State of Texas :

1845: Texas agrees to become a member of the United States.
texas state capitol austin texas