The First World War was one of the deadliest conflicts in history. The Central Powers (Germany, Austria-Hungary, and the Ottoman Empire) opposed the Triple Entente (France, Russia, and Great Britain).

World War I in Photos One hundred years ago, in the summer of 1914, a series of events set off an unprecedented global conflict that ultimately claimed the lives of more than 16 million people ...

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A series of hand-painted postcards sent from the trenches reveal one German soldier's intimate view of World War One ... weather to go for a walk. All pictures extracted from Postcards from ...