User blog comment:Harold Burned-Mane/The Truth about Ulfric Stormcloak/@comment-28600204-20130913153852/@comment-17114085-20130915123637

If you don't throw out Elenwen then it Tulius who uses the negotiation to get some territories, maybe its a confidence thing (if in the begining you side with Ulfric he thinks your a Stormcloak and will give him an advantage, vice versa with Tulius).

Well i don't think that would work lets see why. First the whole of Tamriel knows that Ulfric hates the Thalmor and the Legion(after the Markarth Incident), so even if he disguises his men the Thalmor would be suspitious. Second even if the Thalmor had no idea who killed their agents they would still bring more to Skyrim, and make the Legion help defend them, but this time they would be more aware and not be surprised.

Talos guide you-Harold Burned-Mane