User blog comment:Wolfishtail/Races and sides in the civil war/@comment-172.6.60.43-20130604213307

Seeing as how the Stormcloaks are very anti-elf, I think that the four races of mer would probably join the Empire, although the Altmer would probably be wearing Thalmore attire. Khajiit and Argonians, however, are a mixed bag. The two races of beastfolk are known for supporting their own armies in their homeland, so it's hard to say who they would join in this conflict.

That being said, my level 65 Argonian is with the Empire, so....