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Date |
Event(s) |
| 1 | 1914 | - 28 Jul 1914—11 Nov 1918: World War One
World War fought in Europe
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| 2 | 1917 | - 6 Apr 1917: U.S. Enters WWI
United States declares war on the Central Powers (Germany, Austria-Hungry)
|
| 3 | 1939 | - 1 Sep 1939—2 Sep 1945: World War Two
war fought on a global scale between the Axis Powers (Germany, Italy, Japan) and the Allied nations (U.S., France, Great Britain)
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| 4 | 1941 | - 7 Dec 1941: Attack on Pearl Harbor
Japan attacks U.S. Pacific Fleet at Pearl Harbor Hawaii. United States declares war on Japan and Germany.
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Bef 1920 - Yes, date unknown