need ! besides the new weapons, how did the civil war differ from earlier wars and become known as the first modern war

The American Civil War became known as the first modern war because it was the first war to ever use modern weapons. While other wars such as the American Revolutionary War used gunpowder, the American Civil War used weapons such as the Gatlin Gun, used by General Custer, repeater rifles and pistols, and grenades.

It was butter nut swuash sweetie pie i have no idea