the assailant, and facilitate his success. But for the conqueror to.maintain himself there afterwards will involve infinite difficulties, both with the conquered and with those who have aided him in his conquest. Nor will it suffice to extinguish the line of the sovereign, because the great nobles remain, who will place themselves at the head of new movements; and the conqueror, not being able either to satisfy or to crush them, will lose the country again on the first occasion that presents itself.
If now we consider the nature of the government of Darius, we shall find that it resembled that of the Turk, and therefore it was necessary for Alexander to attack him in full force, and drive him from the field. After this victory and the death of Darius, Alexander remained in secure possession of the kingdom for the reasons above explained. And if his successors had remained united, they might also have enjoyed possession at their ease; for no other disturbances occurred in that empire, except such as they created themselves.
Countries, however, with a system of government like that of France, cannot possibly be held so easily. The frequent insurrections of Spain, France, and Greece against the Romans were due to tle many petty princes that existed in those states; and therefore, so long as the memory of these princes endured, the Romans were ever uncertain in the tenure of those states. But all remembrance of these princes once effaced, the Romans became secure possessors of those countries, so long as the growth and power of their empire endured. And even afterwards, when fighting amongst themselves, each of the parties were able to keep for themselves portions of those countries, according to the authority which they had acquired there; and the line of their sovereigns being extinguished, the inhabitants recognized no other authority but that of the Romans.
Reflecting now upon these things, we cannot be surprised at the facility with which Alexander maintained himself in Asia; nor at the difficulties which others experienced in preserving their conquests, as was the case with Pyrrhus and many others, and which resulted not from the greater or lesser valor of the conqueror, but from the different nature of the conquered states.
