Our Army often undertakes assigned missions it would not have chosen for itself. Perhaps the most complex, demanding, and controversial of such missions features its intervention in domestic civil disturbances-upholding lawful government when the threat to law and government comes from among our own American citizens. As unappealing as the image of American soldiers confronting American citizens may be, the military responsibility to assist in securing domestic tranquility has deep constitutional roots. For over two hundred years our soldiers have often proved the instrument of last resort...