The war itself was incredibly destructive. Over 15 million people were killed and over 20 million wounded. In France, 13.3% of the male population between the age of 15 and 49 died in the war. The war also saw a lot of civilians die, especially in the Ottoman Empire, where more than 2 million of the 3 million people killed were non-combatants. But like so many other wars, World War I's most efficient killer was disease. Stupid disease, always hijacking history. Dysentery, typhus, and cholera were rampant, and otherwise minor injuries would prove fatal when gangrene set in.