Empire

An empire was a form of government which encompassed multiple nation-states and whose head of state was typically an.

Earth empires

 * Austrian Empire
 * British Empire
 * Byzantine Empire
 * Chinese Empire
 * Empire of Japan
 * French Empire
 * Incan Empire
 * Mughal Empire
 * Ottoman Empire
 * Persian Empire
 * Prussian Empire
 * Roman Empire

Planetary empires

 * Danteri Empire
 * Lyran Star Empire
 * Tarn Empire
 * Tkon Empire

Interstellar empires

 * Ajir Empire
 * Akerian Empire
 * Alsuran Empire
 * Arret Empire
 * Chodak Empire
 * Empire of Orion
 * Empire of Thrace
 * Iconian Empire
 * Karg Empire
 * Karsid Empire
 * Kelvan Empire
 * Khnndak Empire
 * Klingon Empire
 * K'tralli Empire
 * Lhiaarian Empire
 * Lyaksti Empire
 * MacMurray Empire
 * Maurya Empire
 * M'dok Empire
 * Miradi Empire
 * M'Tezir Empire
 * Nax Empire
 * Orion Empire
 * Qavok Empire
 * Romulan Star Empire
 * Sarkassian Empire
 * Selakar Empire
 * Shi'ar Empire
 * Tandaran Empire
 * Tarn Empire
 * Terran Empire
 * Thallonian Empire
 * Tomariian Empire
 * Vulcan-Andorian Empire
 * Yemai Empire