User blog comment:Some Argonian Named Kesch/Stormcloak Rebellion: Is Anyone Really Right?/@comment-24165787-20131113212045/@comment-13446185-20131115042915

The Argonians have Sithis on their side.

Well technically Sithis would also be on Tiber's side as Tiber is a Shezarrine, meaning he is an avatar of Lorkhan, who is the manifestation of Sithis.