The causes of the difficulty of occupying the Turkish kingdom are, that the invader could not be invited by princes of that kingdom, nor hope to facilitate his enterprise by the rebellion of those around him, as will be evident from reasons given above. Because, being all slaves, and bound, it will be more difficult to corrupt them, and even if they were corrupted, little effect could be hoped for, as they would not be able to carry the people with them for the reasons mentioned. Therefore, whoever assaults the Turk must be prepared to meet his united forces, and must rely more on his own strength than on the disorders of others; but having once conquered him, and beaten him in battle so that he can no longer raise armies, nothing else is to be feared except the family of the prince, and if this is extinguished, there is no longer any one to be feared, the others having no credit with the people; and as the victor before the victory could place no hope in them, so he need not fear them afterwards. The contrary is the case in kingdoms governed like that of France, because it is easy to enter them by winning over some baron of the kingdom, there being always some malcontents, and those desiring innovations. These can, for the reasons stated, open the way to you and facilitate victory; but afterwards, if you wish to keep possession, infinite difficulties arise, both from those who have aided you and from those you have oppressed. Nor is it sufficient to extinguish the family of the prince, for there remain those nobles who will make themselves the head of new changes, and being neither able to content them nor exterminate them, you will lose the state whenever an occasion arises. Now if you will consider what was the nature of the government of Darius you will find it similar to the kingdom of the Turk, and therefore Alexander had first to completely overthrow it and seize the country, after which victory, Darius being dead, the state remained secure to Alexander, for the reasons discussed above. And his successors, had they remained united, might have enjoyed it in peace, nor did any tumults arise in the kingdom except those fomented by themselves. But it is impossible to possess with such ease countries constituted like France. Hence arose the frequent rebellions of Spain, France, and Greece against the Romans, owing to the numerous principalities which existed in those states; for, as long as the memory of these lasted, the Romans were always uncertain of their possessions; but when the memory of these principalities had been extinguished they became, with the power and duration of the empire, secure possessions.