According to incomplete statistics, the First World War lasted four years and three months, the war 33 countries, involved in the war of the population of more than 1.5 billion. Both sides mobilized army war 6540 people, more than 30 million military and civilian casualties, direct war costs $ 186.3 billion, $ 330 billion in property damage.
33 countries involved in World War I has 1.5 billion people. Territorial military operations involving up to four million square kilometers, front length 2500 ~ 4000 km. In 1914, Britain, France and Russia (including colonies) of the total population of 704.5 million, while the mobilization of the Army Force finished up 977.7 million;Austria and Germany (with German colony) of the total population of 1.3 million people, while the mobilization of the Army Force completed 634 million. During the war, the Allied troops mobilized a total of 4218 million people, the loss of 2,210 million people, which killed more than 515 people; Allied troops mobilized 2,285 people total loss of 1,540 million people, which killed more than 338 people. Direct war costs warring parties about $ 1863 more than 100 million
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