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Assassination of Archduke Franz Ferdinand
Archduke Franz Ferdinand and his wife, Sophie, are assassinated by a Bosnian Serb nationalist in Sarajevo. -
Start of WWI.
Austria-Hungary declares war on Serbia. -
Declaration of war on Germany.
Italy declares war on Germany, thus expanding the scope of its military activities beyond the Italian-Austrian Front. -
Battle of Somme
The Battle of the Somme, also known as the Somme Offensive, was a battle of World War I fought by the armies of the British Empire and French Third Republic against the German Empire.