...What militia might this be? Are there currently state militias outside of the National Guard?
Texas has an organization called the Texas State Guard, an auxiliary group which, IIRC, receives some state funding, does pack iron for security, that comes in and takes over the security and maintenance of NG armories where the unit has been called to service away from its community. Perhaps that's a bit too organized to be considered an unorganized militia.
A truly unorganized militia might be like the one a few years ago that consisted of mostly friends and relatives of Texas Army National Guard personnel in Houston who answered a hasty call for assistance to move a lot of motor-pool vehicles to a more secure location during a weather-related event.
Or more recently in the flooded Midwest, the unorganized militia might be thought of as all of those citizens who showed up with NG units to assist in sandbagging and other flood-protection duty.
Or perhaps the Minuteman organization qualifies?
