The American Civil War was one of the earliest true industrial wars in human history. Railroads, steamships, mass-produced weapons,
and various other military devices were employed extensively. The practices of total war, developed by Sherman in Georgia, and of
trench warfare around Petersburg foreshadowed World War I in Europe. It remains the deadliest war in American history, resulting in
the deaths of 620,000 soldiers and an undetermined number of civilian casualties. Ten percent of all Northern males 20-45 years of age
died, as did 30 percent of all Southern white males aged 18-40.