* 1917 – World War I: The United States declares war on Germany ( see President Woodrow Wilson's address to Congress ).
* 1917 – World War I: The United States declares war on Austria-Hungary.
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* 1917 – World War I: The United States declares war on Germany ( see President Woodrow Wilson's address to Congress ).
* 1917 – World War I: The United States declares war on Austria-Hungary.
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