Quick google search , I’d only heard of one on the list, the Oklahoma Volunteer Militia was in the news a few years back. Seems like they traveled west to support Clive Bundy as I recall.
Lol they have forums
https://www.mymilitia.com/forums/forum/42-oklahoma-militias/
Not clicking on that link. Don’t need another alphabet agency to add me to their list of people to watch. [emoji12]