The Civil War, but for your consideration to be added to the list - The French and Indian War just prior to the Revolutionary War.
Missileer said:Lincoln said about Gen Grant's drinking. 'Tell me what brand he drinks so I can give it to the rest of my officers". There were a lot of innovations in arms during the Civil War, breech loading carbines, cased bullets, grape shot in cannons. Then the repeating rifle, Henry, I think. The tactics stayed the same though, such as long bayonet charges against fortified troops.
Pvt.Joker said:The bloodiest war in US history?
How abbout the genocide of almost all the native Indians!!!