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Archduke Franz Ferdinand's Assassination
On this day, Archduke Ferdinand and his wife in Austria-Hungary were assassinated by a Serbian. -
Austria-Hungary and Serbia
On this day, Austria-Hungary declared war on Serbia one month after the assassination. -
Russia Mobilizes
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Germany and Russia
On this day, Germany declared war on Russia. -
Germany and France
On this day, Germany declared war on France. -
Britain and Germany
On this day, Britain declared war on Germany. -
Austria-Hungary and Russia
On this day, Austria-Hungary declared war on Russia. -
France, Britain, and Austria-Hungary
On this day, France and Britain declared war on Austria-Hungary. -
U.S. Enters The War
On this day, the U.S. joined the war supporting their allies, Russia, Britain, and France. -
Armistice Signing
The Allies and Germany signed an armistice on this day, causing the end of the war. -
Treaty of Versailles
The war officially ended after the Treaty of Versailles was signed on this day.