What were the key dates of World War 1?

Answer 1

The Final spark that started the war was the assassination of Archduke Franz Ferdinand on June 28th 1914, by Serbian activists. This mean that on July 28, Austria-Hungary declared war on Serbia. Now, here's the confusing bit; Russia, Serbia's Ally, orders full mobilisation of troops. This causes Germany, Serbia's Ally, to declare war on Russia on August 1st. Russia's Ally FRANCE now mobilise their troops. Germany declares war on France, too. Britain, allied to France, intervein and declare war on Germany.