The Prince by Niccolo Machiavelli Chapter 5 Page 1

How Cities or Provinces Which Before Their Acquisition Have Lived Under Their Own Laws Are To Be Governed

When a newly acquired State has been accustomed, as I have said, to live under its own laws and in freedom, there are three methods whereby it may be held. The first is to destroy it; the second, to go and reside there in person; the third, to suffer it to live on under its own laws, subjecting it to a tribute, and entrusting its government to a few of the inhabitants who will keep the rest your friends. Such a Government, since it is the creature of the new Prince, will see that it cannot stand without his protection and support, and must therefore do all it can to maintain him; and a city accustomed to live in freedom, if it is to be preserved at all, is more easily controlled through its own citizens than in any other way.