Why did so many soldiers die in world war 1

World War 1 casualties. ... Of the 60 million soldiers who fought in the First World War, over 9 million were killed — 14% of the combat troops or 6,000 dead soldiers per day. The armies of the Central Powers mobilised 25 million soldiers and 3.5 million of them died.

Military casualties reported in official sources list deaths due to all causes, including an estimated 7 to 8 million combat related deaths (killed or died of wounds) and another two to three million military deaths caused by accidents, disease and deaths while prisoners of war.

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