total number of americans killed in all wars
1 The official number of Americans killed in the Revolutionary War (4,435) is only about 2/3 the numbers usually given by historians.  The total of US combat deaths during the Civil War is given as 140,414 -- or some 30,000 higher than most historians would estimate. I suspect (but don't know for sure) that the boost may come from the DoD counting deaths among POWs as combat rather than disease.