“What would such a conflict look like with no clear geographical or physical boundaries between the parties?”
The plot line of “Unintended Consequences” is the most likely scenario. Each person decides on the target of their choice & removes them as they can. At least that would be the case on the conservative side. The lefties would probably be a little less selective in their violence.
Spanish Civil War, the countryside versus the cities. It was ugly.
Just looked up “Unintended Consequences” on Amazon. You don’t see many books with almost all five-star reviews. Thanks for the recommendation.