The Elder Scrolls Online is an upcoming MMO made by Zenimax Online Studios.
They have released a new developer diary which shows the relationship between different factions and what makes them unique. The video titled alliances of war gives more information about them these factions.
The developer video is narrated by Loremaster Lawrence Schick, and tells you why the Aldmeri Dominion, Daggerfall Covenant, and Ebonheart Pact are at war in The Elder Scrolls Online.
Their reasons and motives for fighting, the key people and groups involved and other things are described here.
The game will be released sometime this year and is in development for four years now. The game will be released on PC and Mac.
Check out the video below.