We live in a world where information and millions of people can be shared effortlessly. Motivated groups and individuals will be able to find out everything they need to know from voter rolls, government databases, private marketing databases, etc. There are many social analytical software tools that can be used to analyze phone records and emails, perform sentiment analysis that will give very clear information on targets. Imagine all of the corporate world's marketing tools turned to violence ends.
Here is a graph analysis of the Star Wars movie characters:
As you can see from the graph above, Obi-Wan the old, desert-rat, hermit "knows too much!"
I used Star Wars to lighten the mood of an otherwise Orwellian topic. For background on this type of analysis here is the link the the Star Wars Social Network http://evelinag.com/blog/2015/12-15-star-wars-social-network/
With this type of analytical tool the nodes of the major players can be sized, colored, and arranged according to their centrality, number of connections to other actors/nodes that that you're interested in. With this type of tool information starts popping out and people of influence or of interest become visible. Imagine this being applied to people in your neighborhood or City based on information regarding who they call, email, text, write checks to, what restaurants they eat at, what clubs/associations they belong too.
These tools can and will be used in the event of the Civil War in America. While we have a lot of tree hugging savages, Americans of all political beliefs are very techno-savvy. This may be turn out to be the first information-driven Civil War.
320 million people in the USA and all of them are different. People in the South relate and feel allegiance to the state of their birth. I cannot speak for Yankees but down here many the majority, but not all of course, will immediately fall back on the state and show patriotism to their state and governor(s). Some states, mostly Yankee, where a lot of socialist live and depend on government will immediately go anarchy. This will exacerbate the secession that will surely follow. Each state, each community is different. They may be anarchy in huge cities but