User blog comment:Draevan13/An examination of the Third Dominion's military/@comment-9062114-20140801172504/@comment-1600847-20140801174755

We do see them fighting in the First Dominion, we see it in ESO. I've mowed down countless Bosmer and Khajiit troops during the Pact missions. The Khajiit don't worship the Altmer, but they don't need to worship them to fight for them.

Regarding the Nord-only Stormcloaks point, as I said above, we only see Thalmor in Skyrim, no frontline Dominion troops. Thalmor are only Altmer, and even then only Altmer deemed "pure".

As for the Bosmer, I'd go with fear as the primary motivator. Purging those who won't go along with you is an easy way to motivate the rest. Take the Czechs: the Nazis killed thousands of them, yet thousands more served in the German army near the end of the war. Even with the Allies and Soviets moving in to liberate them from west and east, they too afraid to rebel against the Nazis. Others were just evil people in it for power. It could easily be the same for the Bosmer.