Let us not forget that American regulars had in the later part of the war been trained after Prussian fashion, given it the discipline necessary to hold their own against British linetroops and their commanders one of the tools they needed to defeat the British.
Irregular warfare surly played a great role in many theaters of war: America, Spain, Tyrol, Russia, the German States. A strong irregular force in your region should curtail earnings, deplete your stationed troops, destroy (military) infrastructur and so on.
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