High King Emeric was the leader of the First Daggerfall Covenant. The Covenant consisted of the Nords and the Bretons. The Lion Guard is the main military force of the Covenant.
The First Daggerfall Covenant was created during The Crossing War when three Imperial Legions marched into High Rock. The First Daggerfall Covenant was later changed to the Daggerfall Covenant after the Nord-Orc War because the Nords left the Covenant and the Orcs and Redguards joined it.