The War Between the Provinces is a series of fantasy novels by Harry Turtledove.
The novels are a retelling of the American Civil War in a high fantasy setting called the Kingdom of Detina.
The series focuses on the Eastern theater of the War Between the Provinces.
The names of locations have been changed, and North and South (and west and east) have been reversed, and, rather than skin color, hair color is used as the basis for the dehumanization.
Hand-cranked crossbows replace guns to mirror slow reloading times, and the northern rebels have fewer flying carpet paths (railroads) than the southern kingdom, hence giving the slave-owning side the same logistical problems that existed in the American Civil War.