So the basic challenge is for someone to come up with a plausible way for their to be a decades long version of the Northern Irish "Troubles" involving a long running multi faceted insurgency with paramilitaries from different groups trying to target each other's paramilitaries and civilians. This situation must also involve the US Federal Government deploying large numbers of troops from the regular Armed Forces with the various paramilitaries trying to fight the US Army in similar way to the manner the Loyalist/Unionist Paramilitaries and the various IRA (and IRA spin off groups) tried to fight the British Armed Forces.
My personal guess would be the most likely way for this to occur is for the US Federal government to proceed with expanding civil rights for black Americans post WW2 partially as a result of a civil rights movement. Only for Southern White segregationists to decide to try and fight back against this "oppression" by forming covert paramilitary groups to try and launch insurgent strikes on civil rights workers, black southerners, and eventually the US Army. These strikes will then lead to the formation of black radical paramilitary groups trying much the same tactics. As a result of the brewing conflict Congress overrides "Posse Comitatus" and the Federal Government sends large numbers of troops from the Regular Army to restore order.
So thoughts?
My personal guess would be the most likely way for this to occur is for the US Federal government to proceed with expanding civil rights for black Americans post WW2 partially as a result of a civil rights movement. Only for Southern White segregationists to decide to try and fight back against this "oppression" by forming covert paramilitary groups to try and launch insurgent strikes on civil rights workers, black southerners, and eventually the US Army. These strikes will then lead to the formation of black radical paramilitary groups trying much the same tactics. As a result of the brewing conflict Congress overrides "Posse Comitatus" and the Federal Government sends large numbers of troops from the Regular Army to restore order.
So thoughts?