This matter of "foreign internventionism" is very interesting to me right now particularly as we're also discussing the French Revolution model of social change. Louis XVI was executed mainly because his faction called on a foreign alliance to invade France to restore the legitimate monarch. Napoleon first appears as a historical figure at the siege of Toulon where British forces have landed and are assisting in the defense of the city by the Royalists. And most important of all, the Terror is ignited mainly by the fears of the most extreme Republicans, the Jacobins, that the foreign coalition is invading France from without at its borders but also within by crytpo royalists and bribed treasonous republicans.
So if that psycho social model holds true for the American Republic, faced with foreign intervention, both by bribed officials and by insertion of foreign troops, we can expect a Reign of Terror where the most extreme patriots seize power then go about the necessary but necessarily messy and inaccurate business of purging the country of treasonous elements. The most dangerous place to be will be close to the seat of power. The dictator who will arise to impose these Draconian measures will be a surprise to most. He won't be the most heroic or the most strident or even the most noteworthy in any sense. He will be a silent, watchful, intensely suspicious (to a paranoid degree) cold blooded killer and he will be surrounded by cringing sycophants eager to assist him in his bloody business.