Fortunately the militias today are starting to realize they have no chance if they do not establish a relationship with their sheriff. This has not, however, transferred to large cities to my knowledge. You would be better off forming neighborhood watches and not use the "M" word.
One book I would commend to you that frames it nicely: "Constitutional Homeland Security" by Dr Edwin Vieira.
Thank you for recommending Vieira. Looks like another great addition to the arena of sanity and common sense. FR has such a treasure trove of people with sound wisdom to offer, we must get away from the hysteria and get down to the reality of our situation and STAND!