The First World War, also referred to as the Great War, began in 1914 and ended in 1918.
Described as ‘the war to end all wars’, WW1 saw the world’s great powers clash, with 70 million military personnel taking part.
Two opposing alliances formed: the Allies, also known as the Triple Entente, and comprising the UK, France and the Russian Empire; and the Central Powers, or Triple Alliance, including the German, Austro-Hungarian and Ottoman Empires.
WW1 broke out following the assassination of Archduke Franz Ferdinand of Austria in June 1914, a catalyst that brought to the surface a number of unresolved political and economic areas of dispute.
The Central Powers were ultimately defeated, with the result that the Austro-Hungarian and Ottoman Empires collapsed and the Soviet Union was born. In a vain bid to prevent such devastation from ever happening again, the League of Nations was formed.