Pssst, the Thalmor are the ruling party of the Aldmeri Dominion.
This.
In 4E 22 - Summerset Isle is renamed Alinor after the Thalmor seize total control.
In 4E 29 - A Thalmor backed coup overthrows the government of Valenwood. The Aldmeri Dominion is recreated by the union Alinor and Valenwood.
Somewhat more than a pimple....