28 jul 1914 ano - Austria-Hungary declares war on Serbia

Descrição:

In Austria, June 28, 1914 to be exact, Archduke Franz Ferdinand along with his pregnant wife, were Assassinated. A Serbian terrorist group called The Black Hand were responsible for the kill.

This is the reason behind World War one. World War one caused just about 17 million deaths all over the world. But in of all the negatives, it revolutionised the world in technology and knowledge. But then, it caused World War 2. :(

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