History : World War I

Duration : July 28 1914 - November 11 1918

Countries participated : 
Allies(France, Great Britain and Russia) and Triple Alliance(Germany and Austria-Hungary)

Reason : Imperialism, Militarism, Nationalism and conflicts between the great European powers

Result :

• Allies maintained the naval blockade of Germany
• Treaty of Versailles was signed
• Influenza epidemic in Europe and America

Intriguing factor :

• 500,000 pigeons were regularly dropped into enemy lines by parachute, and then sent back with messages.
• Explosives used to destroy a bridge in France could be be heard over 130 miles away in London.
• 9 million soldiers had been killed and 21 million wounded.