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The Paris Peace Conference begins. -
Armistice. An armistice is signed, ending the fighting. This date is now commemorated as Veterans Day. -
U.S. declares war on Austria-Hungary. -
Germany attacks Verdun. -
Allied forces land at Gallipoli. -
German U-boat sinks the passenger liner Lusitania. -
Austria-Hungary declares war on Serbia. -
Assassination of Archduke Franz Ferdinand of Austria-Hungary in Sarajevo. -
Assassination of Archduke Franz Ferdinand of Austria-Hungary in Sarajevo.
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Major European powers commit to war. -
Germany invades Belgium; the United States declares neutrality. -
First Battle of the Marne. -
The Treaty of Versailles is signed, officially ending the war with Germany.