Approximately 620000 Union and Confederate soldiers died during the American Civil War.
This was the bloodiest American conflict of all times. The number of men who died on duty represented 2% of the population of the USA at that moment. One of four men who went to war did not return home.
The casualties were not only on the battlefield but mostly the product of wounds and sicknesses that couldn´t be properly treated for lack of technology and medical advances. Experts estimate that for one dead in battle, 5 died from injuries and diseases.
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