In any hypothesized American civil war 2.0 who would the opposing sides be and where would their armies be based, and who would be the soldiers/armies of the respective opposing sides?
You see, just prior to the Civil War opposing sides were demarcated very cleanly and clearly, both geographically and politically. The North was located in the northern states and the south or Confederacy was located in the south, for the sake of abbreviated argument. In other words, no doubt existed who was who and who stood for what; each side wore distinctly different uniforms and embodied distinctly different cultures unique to each faction.
At present, here in modern 2022 America, we have one unified standing armed force divided into six branches. Each modern state governor does command a state specific National Guard force, but National Guard forces rely on the regular military and the civilian cabinet secretaries who control it for funding and supply.
Where do troops come from for each side in any second American civil war? Do we divide the standing military down the middle? Seems unlikely. Does the political party in charge at the moment get to use the current standing active military for its troops while conservative state governors use their National Guard units for theirs? Do both sides institute and activate a mass draft? What about troops currently serving in our federal standing military branches who oppose democratic party rule? Do they mass defect and join a coalition of conservative governors?
None of it makes much sense. Politically, I suppose, the nation could be almost evenly divided along very specific political issues, such as pro-life vs. pro-baby killing. Yeah, I could see Americans dividing into opposing armed camps over an issue like abortion—or gun control, perhaps. We still need to figure out where those opposing armies would be geographically based.