World War I (jul 28, 1914 – nov 11, 1918)
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Described as "the war to end all wars",[7] it led to the mobilisation of more than 70 million military personnel, including 60 million Europeans, making it one of the largest wars in history.[8][9] It is also one of the deadliest conflicts in history,[10] with an estimated nine million combatant and seven million civilian deaths as a direct result of the war, while resulting genocides and the resulting 1918 influenza pandemic caused another 50 to 100 million deaths worldwide.
https://en.wikipedia.org/wiki/World_War_I
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