I may be putting words in yellowoftops mouth here, but I don't think the goal of any anti-government militia is a military 'win' condition. I think the goal would be to force a high level political change when soldiers refuse to raise arms against countrymen with legitimate grievances.there is no scenario in which it has the underdog winning.
I got that. But that assumption is that soldiers would refuse to raise arms against insurgents who were specifically trying to undermine the Constitution, which soldiers are sworn to "...defend it from all enemies, both domestic and foreign..." Which is why we know about the My Lai Massacre, etc: Soldiers obeying their OATH, not their orders. I know a lot of soldiers, and worked with the peacekeeping forces from 44 different nations. They take their oath very seriously.