In Skyrim you have the choice of siding with the Imperials or the Stormcloaks. Now, obviously the Thalmor has made the Empire it's puppet after the White-Gold Concordat however after infiltrating the embassy in one of the journals it talks about Ulfric Stormcloack being an asset.
The Thalmor want the Civil War in Skyrim to continue because it weakens the Empire and allows the Thalmor to finish them off one day, so obviously I was to s*** on the Thalmor's plans and put an end to the war (before dealing with Alduin).
I normally side with the empire because of the Blades but the Blades in Skyrim are all but gone (with me being able to restore them) but that Concordat sours things for me so my other option is to side with the Stormcloaks but Ulfric Stormcloack being an asset worries me a bit.
So I am wondering then, the Thalmor call Ulfric an asset, how much of one is he? Is he a sleeper agent and is purposely working with them or is he unaware that the indecisive civil is playing into the Thalmor's plans