Avatar: The Great Age of Peace
The Earth Kingdom is in truth a number of city-states untied under the rule of Ba Sing Se. Though all the city-states swear loyalty to the King, many still have their own hereditary rulers. The Earth Kingdom is composed mostly of farming and mining communities, and is the largest of nations in both population and size.
The Earth Nation is currently ruled by King Bahtsi who has ruled for nearly eighty years. His throne is in Ba Sing Se, the impenetrable city, and he rules with a strong hand. Of all the nations, the Earth Kingdom guards its’ borders the most jealously carefully controlling immigration and trade in their lands. Military service while not mandatory is imposed by social norm, most people serving a minimum of two years in the army.