World War I
World War I lasted from 28 July 1914 to 11 November 1918. It led to the mobilisation of more than 70 million military personnel. It is also one of the deadliest conflicts in history, with an estimated 9 million combatant deaths and 13 million civilian deaths as a direct result of the war. The resulting genocides and the related 1918 Spanish flu pandemic caused another...
