| # | State | What it was
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| 1 | Delaware | Overseas province of Great Britain, then independent state until ratification of U.S. Constitution
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| 2 | Pennsylvania | Overseas province of Great Britain, then independent state until ratification of U.S. Constitution
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| 3 | New Jersey | Overseas province of Great Britain, then independent state until ratification of U.S. Constitution
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| 4 | Georgia | Overseas province of Great Britain, then independent state until ratification of U.S. Constitution
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| 5 | Connecticut | Overseas province of Great Britain, then independent state until ratification of U.S. Constitution
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| 6 | Massachusetts | Overseas province of Great Britain, then independent state until ratification of U.S. Constitution
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| 7 | Maryland | Overseas province of Great Britain, then independent state until ratification of U.S. Constitution
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| 8 | South Carolina | Overseas province of Great Britain, then independent state until ratification of U.S. Constitution
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| 9 | New Hampshire | Overseas province of Great Britain, then independent state until ratification of U.S. Constitution
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| 10 | Virginia | Overseas province of Great Britain, then independent state until ratification of U.S. Constitution
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| 11 | New York | Overseas province of Great Britain, then independent state until ratification of U.S. Constitution
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| 12 | North Carolina | Overseas province of Great Britain, then independent state until ratification of U.S. Constitution
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| 13 | Rhode Island | Overseas province of Great Britain, then independent state until ratification of U.S. Constitution
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| 14 | Vermont | Unrecognized Vermont Republic, then separated from New York in 1791
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| 15 | Kentucky | Separated from Virginia in 1792
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| 23 | Maine | Separated from Massachusetts in 1820
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| 28 | Texas | It was Mexico, and then Independent Republic of Texas from 1836 to annexation in 1845
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| 31 | California | California was Mexico, and then unrecognized Bear Flag Republic and ambiguous status under U.S. military rule to admission as state in 1850. (An Organic act for California failed in 1849.)
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| 35 | West Virginia | Pro-Union counties separated from Virginia in 1863
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