US War Dead Through the Centuries Summarized by Congressional Research Service
Notable findings include these:
** During the period between the Revolutionary War and the
Persian Gulf War, it was the Civil War that produced the most American fatalities, when Union statistics and Confederate estimates are taken into account.
** World War II was the first war in which there were more
battle deaths than deaths from other causes such as accidents, disease, and infections.
** With a total of 382 in-theater deaths, 147 of which were
battle deaths, the Persian Gulf War was the least costly war in terms of fatalities.
** The ongoing Operation Iraqi Freedom to date has produced
more than four times the number of in-theater deaths than the Persian Gulf War (which lasted seven months).
A copy of the CRS report was obtained by Secrecy News.
See "American War and Military Operations Casualties: Lists and Statistics," updated July 13, 2005:
http://www.fas.org/sgp/crs/natsec/RL32492.pdf