Does anyone know any good resources concerning the topic of how martial law would be implemented in the United States?
I did that, but unfortunately a lot of the material doesn't seem to be very credible. Most of what I found was tainted by some anti-government ideal that believes every American will be shot on sight when martial law is implemented. The information I found on REX 84 proved interesting, but again, I couldn't find much that I found credible.
I doubt you will find many neutral discussions. Martial law inevitably stirs up strong emotional reactions. You will have to read between the lines and distinguish between facts and opinion.