Except in a few instances he restored the kingdoms of which he gained possession by the right of conquest to those from whom he had taken them or joined them with other foreign nations. He also united the kings with whom he was in alliance by mutual ties, and was very ready to propose or favour intermarriages or friendships among them. He never failed to treat them all with consideration as integral parts of the empire, regularly appointing a guardian for such as were too young to rule or whose minds were affected, until they grew up or recovered ; and he brought up the children of many of them and educated them with his own.