United Kingdom
The United Kingdom of Great Britain and Ireland was a Constitutional Monarchy with territory throughout the Sol system. At its height, the United Kingdom directly controlled a large colonial empire on Earth and Luna, as well as several outposts throughout the rest of the Sol system. The United Kingdom also indirectly controlled a large number of other colonies through the Britannic Trading Company, a crown corporation under the nominal authority of the British monarch. The United Kingdom was officially dissolved into the European Commonwealth in 1945.