Germany declared war on France and sent its first wave of troops to Belgium to start the attack.
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After nearly four and a half years of cataclysmic conflict, World War I ended.
During World War I, as a soldier, Adolf Hitler was injured by a grenade blast.
Registration of US men aged between 21 and 31 began for troops for WWI.
The First Battle of the Marne began during World War I.
The last Australian troops were evacuated from Gallipoli during World War I.
