I have some tangentially related links, more to the topic of insurgency than self defense militias. The best way to be militant is to study the military, particularly insurgencies and counter strategies. As for forming a group, your only hope is to meet people and discuss it with them. Bring them information that they don't have and make it interesting. Keep in mind that forming online groups is useless a far as militia and self defense is concerned. Read, read, read, but don't forget what Emperor Aurelius said: eventually you must quit your books and resume living. https://snugbus.com/Library/index2.php https://www.rand.org/ Some specific reports of interest: Victory Has a Thousand Fathers, Sources of Success in Counterinsurgency https://www.rand.org/pubs/monographs/MG964.html Victory Has a Thousand Fathers, Detailed Counterinsurgency Case Studies https://www.rand.org/pubs/monographs/MG964z1.html Paths to Victory: Lessons from Modern Insurgencies https://www.rand.org/pubs/research_reports/RR291z1.html Paths to Victory: Detailed Insurgency Case Studies https://www.rand.org/pubs/research_reports/RR291z2.html Understanding Proto-Insurgencies https://www.rand.org/pubs/occasional_papers/OP178.html https://jsou.libguides.com/jsoupublications/eucom https://www.hsdl.org/?view&did=838149