Royal cousins Wilhelm II and King George V went to war As nations gear up to mark 100 years since the start of World War One, academic argument still rages over which country was to blame for the ...

Also often called the First World War or The Great War, here is Newsround's guide to what happened during World War One, a global conflict that started 110 years ago.

One hundred years after the guns of World War One fell silent, the leaders of France and Germany held hands and rested their heads against one another in a poignant ceremony to mark the signing of ...

Russia's exit. Russia's exit from World War One, in 1917, must have made an eventual victory for Germany seem quite likely to German leaders, and vindicated their nurturing of Russian dissidents.