Civil War is a haunting take speculative war film, splintering the United States into four distinct factions. The film doesn’t dive too deeply into the origins or specifics of the conflict that eventually overtook the country, instead keeping the focus grounded on four reporters who make their way through what remains of the United States. This means the setting isn’t fully explored, allowing different opposing forces to rally against one another. Much of the film takes place in the Loyalist States, which have remained in the union. There’s no major visit to the other three major factions and their territory.

https://screenrant.com/civil-war-united-states-america-map-state-alliances-explained/