how were empires dofferent from kingdom

Solution,

Kingdom is a region ruled directly by a king or ruler and consists mostly of people of same language, customs and traditions. An empire on the other hand is a much larger region ruled by an emperor. An empire may consist of many groups of people of different languages, traditions and ethnicity. An empire may also include many smaller kingdoms ruled by smaller kings or rulers. An emperor could bring many small kingdoms under his rule by wars, forcing the kings to accept his supremacy. In this case although the kingdoms are ruled by their own kingdom they belong to a much larger empire. This was the case with Ashoka the emperor. Ashoka exerted his influence over many kingdoms like Kalinga, Gandhara and other smaller kingdoms.