Birthright
Further information: Birthright (campaign setting)A setting in which the players took on the powers of the divinely-empowered rulers of nations, with emphasis on tactical gameplay with a broad scope. This campaign setting is no longer officially supported. Wizards does however have a fan-driven community which has converted the setting to version 3.5 and is currently working on a 4.0 conversion. Birthright.net
Read more about this topic: Dungeons & Dragons Campaign Settings