One of the greatest fallacies is that history repeats itself. That may be true in some instances, but in war, it is almost never the case.
The French fell quickly to the Germans in WWII because they were prepared to fight the last war - slow moving trench warfare. The Germans ran right around (and over) their defenses.
Time and time again countries prepare defenses based on history. Time and time again some upstart rewrites the rule book and takes them by surprise.
There is no reason to think that the US Civil War II will be anything like the first Civil War. I could easily envision a "war" of escalating "terrorist" attacks. Whoever is in charge of the Federal Government would initially respond by restricting civil liberties - right of assembly, bear arms, etc. - but would eventually have to resort to martial law.
If the Dems control the Federal Government, the resistance will be more organized and will likely attempt to control geographical areas. From the resistance you could expect road blocks by "militia", airports and ports being take over, and "militias" being posted at utilities to keep the power and water flowing. Some sort of secession followed by a declaration of independence will follow.
If the Republicans control the Federal Government, the resistance will be loosely aligned groups, each with its own agenda and level of violence. Expect bombings and assignations. Killing will probably be more random and aimed at turning the populace away from the government.
Who are we planning to rebel against? I am not planning on rebelling against anyone. The South didn't "plan" on secession, it evolved over time as events dictated it. They seceded when they felt they had no other choice. If the Dems win in November, and if there is evidence that they "stole" the election, I can see how many people would begin to see that they had no other choice but to separate from the Federal Government. Conversely, I can see the left absolutely loosing it if there is a close election and Bush wins. There will likely be loony tunes seeking to "nullify" the results violently.
All we have to do to quell a liberal revolt is give them lots of pot. Just throw bales into the crowd and they will disperse like (in?) smoke.
"Expect bombings and assignations."
Hollywood. So much violence and sex; sex and violence.