When a Faction (A.K.A. Kingdom) vassalizes another One, the leading Faction (the Faction which rules the other) can create an Empire. It will include the Overlord Faction and the Vassal Factions. The King of the Leading Faction will become Emperor as they rule over the Vassal Kings. When forming a new Empire, Leading Faction and Vassal must border each other.
The Federation is another kind of kingdom's coalition, which doesn't have vassals but instead each member of the federation has the same rights as the others. The ruler get elected periodically.
Empires and Federations have their own Chats like Kingdoms, PvP is disabled between Factions which are in the same Empire/Federation. The Emperor/Chancellor can also distribute Titles among his Servants.
|The Northern Pact||Durin's Folk||Arnor, Rivendell and Woodland Realm|
|Servants of Sauron||Lothlorien||Angmar, Dunland, East-Lorien, Gundabad and Isengard|
|Servants of Annatar||Mordor||Mordor and Rhudel|
|Anâthãni||Gondor, Harad, Rohan and Umbar|
|Forodrim Ardhin||(Federation)||Lindon, Rivendell, Ondolindë, Arnor, Woodland Realm, Shire, Durin's Folk|
|Far Haradic Empire||Morwaith||Taurethrim|
|Silvani Hegemony||Lothlórien||East Lórien|
|Great Rhûnic Empire||Wainriders||Red Mountains, Avari Elves|
|Dark Legion Empire||Mordor||Angmar, Dol Guldur, Gundabad, Gulfings, Half-Trolls, Harnedhrim, Isengard, Rhudel, Umbar, Wainriders.|
|Servants Of Sauron||Mordor||Angmar, Dunland, Gundabad, Half-Trolls, Isengard, Rhudel, Umbar, Wainriders.|
|Dor en Anbor y Ithil||Dorwinion||Dol Guldur|
|Khazâdul||Durin's Folk||Blue Dwarves, Dale, Lothlorien|
|Khazadûl III||Durin's Folk||Rohan, Isengard|
|Niðavellir||Durin's Folk||Woodland Realm|