User blog comment:Zippertrain85/Why The Imperials Are Wrong/@comment-172.6.60.43-20130709154014/@comment-80.216.217.200-20130712102553

Let's see;

http://elderscrolls.wikia.com/wiki/Thalmor

"The Thalmor is the governmental representation of the Third Aldmeri Dominion, the union of Valenwood and the Summerset Isles. As explained by Delphine, the members of the Thalmor are"elven supremacists"..."

There's nothing about being a third army/legion there from what I can see.