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It was an attempt in Sarajevo. Where Gavrilo Princip murder the archduke Franz Ferdinand.
That event created a diplomatic crisis when Austria-Hungary give an ultimatum to the Kingdom of Serbia. -
The Austrian attack Serbia trying to invade it.
During that Russia mobilised and Germany invaded Belgium. -
In 1911 the Stavka russia agree to the french's to attack germany. That agreement wasn't realistic and the second army of russia was annihilate by the germans in the Battle of Tannenberg. -
In 1914 the general Alexander von Kluck disobeyed the orders and acted freely making a breach in the german army. The Frenchs and Brittis exploit it to stop the German invasion of Paris in the First Battle of Marne. -
It started with a massive bombing from Britanis and Frenchs warships against the Ottomans forts that control the strait, but it failed because there were mines. It causes a combinated operation. -
It was one of the bloodiest battles. The German army attacked the powerfulest fort of france. Verdun isn't the principal objective, it was to reach the edge of the Mosa river. -
The expeditionary forces of Great Britain under Douglas Haig assume the leadership of Somme, because the french's divisions died in the Battle of Verdun. -
Germany through the operation Georgette to reach the ports of the North Canal of La Mancha.
It was the last great offensive of Germany in the western front. -
In Brest-Litovsk, which is a Bielorussia city, Russia made peace with the German, Austro-Hungarian empire, Ottoman empire and Bulgaria empire.
With that pact, WWI ended.