“ Tranquility is the first duty of every citizen ” has never been an American motto. “ What is impressive to one who begins to learn about American violence,” Richard Hofstadter once remarked, is its “ extraordinary frequency, its sheer commonplaceness in our history, its persistence into very recent and contemporary times, and its rather abrupt contrast with our pretensions to singular national virtue.” If, as Hofstadter complains, violence has been overlooked in American history, the maintenance of peace, particularly the significant role of the militia in public disorders — “ the most important single form of domestic violence in American history ” — has been almost totally ignored by historians. For example, Marcus Cunliffe's otherwise excellent study of the military mind in ante-bellum United States devotes two sentences to the subject, a rather surprising omission in view of the, quite correct, contemporary opinion that “the Militia are, after all … neither more nor less than an Auxiliary Police Force, and for the last forty-odd years that is the only duty they have ever been called on to perform.”