Throughout the war, fighting was largely concentrated in areas around the border between Southern slave states and Northern free states. Still, Civil War battles spread across a total of 23 states ...

Alex Garland's dystopian action movie Civil War hits cinemas this Friday, and speculation is already rife about what has divided the nation—and which states are on either side of the rift.

And though the fighting was concentrated in areas around the border between Southern slave states and free Northern states, Civil War battles spread across a total of 23 states and territories ...