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 1884 - 
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Date |
Event(s) |
| 1 | 1889 | - Nov 1889: North Dakota, South Dakota, Montana, Washington become U.S. states
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| 2 | 1890 | - 1890: Idaho, Wyoming become U.S. states
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| 3 | 1896 | - 4 Jan 1896: Utah becomes a U.S. state
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| 4 | 1898 | - Apr 1898—Aug 1898: Spanish-American War
- 10 Dec 1898: The Treaty of Paris of 1898 is signed, giving the United States control of Cuba, the Phillipines, Puerto Rico, and Guam
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| 5 | 1907 | - 16 Nov 1907: Oklahoma becomes a U.S. state
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| 6 | 1912 | - 1912: New Mexico, Arizona become U.S. states
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| 7 | 1914 | - Jul 1914—11 Nov 1918: World War I
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| 8 | 1917 | - 6 Apr 1917: United States declares war on Germany, entering World War I
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| 9 | 1918 | - 11 Nov 1918: World War I ends
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| 10 | 1939 | - 1 Sep 1939—2 Sep 1945: World War II
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| 11 | 1941 | - 1941: Thanksgiving Day is set to be 4th Thursday in November by Franklin Roosevelt
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| 12 | 1945 | - 2 Sep 1945: Formal surrender of Japan, ending World War II
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| 13 | 1959 | - 1959: Alaska, Hawaii become U.S. states
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