- 1999
| |
Date |
Event(s) |
| 1 | 1914 | - 1914: World War I begins. Triple Alliance: Germany, Italy, and Austria-Hungary vs. Triple Entente: Britain, France, and Russia. The United States joined on the side of the Triple Entente in 1917.
- 1914: Garrett A. Morgan invents the Morgan gas mask.
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