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Triple Alliance is formed
Triple Alliance is formed between Germany, Italy and Austria-Hungary -
Triple Entente is formed
Triple Entente is formed between Britain, France and Russia -
Franz Ferdinand is assassinated
Franz Ferdinand is assassinated in Sarajevo -
Austria-Hungary presents demands to Serbia
Austria-Hungary presents 10 demands to Serbia -
Serbia agrees to some demands
Serbia agrees to only 9 of the 10 demands made by Austria-Hungary -
Austria-Hungary declares war on Serbia
Austria-Hungary declares war on Serbia -
Russia promises support
Russia promises support for Serbia -
Germany declares war
Germany declares war on Russia -
Germany declares war on France
Germany declares war on France and invades Belgium -
Britain declares war on Germany
Britain declares war on Germany (Australia becomes involved) -
Austria-Hungary declares war on Russia
Austria-Hungary declares war on Russia -
Japan declares war on Germany
Japan (an ally of Britain) declares war on Germany -
Battle of Tannenberg
World War I battle fought at Tannenberg, East Prussia (now Stębark, Poland), that ended in a German victory over the Russians. -
Trench warfare begins
Trench warfare begins on the Western Front -
Turkey enters the war
Turkey enters the war on the side of Germany -
First Zeppelin raid on Britain
First Zeppelin raid on Britain -
Sinking of the RMS Lusitania
The sinking of the Cunard ocean liner RMS Lusitania occurred on Friday, 7 May 1915 during the First World War, as Germany waged submarine warfare against the United Kingdom which had implemented a naval blockade of Germany. -
Italy enters the war
Italy enters the war on the side of the Triple Entente -
Withdrawal of the ANZACs from Gallipoli
The evacuation of Anzac Cove began on 15 December, with 36,000 troops withdrawn over the following five nights. -
Period: to
The Somme
The Somme was a battle of the First World War fought by the armies of the British Empire and the French Third Republic against the German Empire. -
The Armistice is signed
The Armistice is signed and the war ends