With the partial exception of the United Kingdom, all of the states at the time did not keep especially accurate records, so calculating losses is to a certain extent a matter of conjecture. This method became so successful that he was subsequently asked to organize the medical care for the 14 armies of the French Republic.
'Napoleon's Surgeon', Baron Dominique Jean Larrey, used horse-drawn carts as ambulances to quickly remove the wounded from the field of battle. Medical treatments were changed drastically at this time. Note that the following deaths listed include both killed in action as well as deaths from other causes: diseases such as those from wounds of starvation exposure drowning friendly fire and atrocities.
The casualties of the Napoleonic Wars (1803–1815), direct and indirect, are broken down below: Total fatalities of the Napoleonic Wars A mass grave of soldiers killed at the Battle of Waterloo