Mechwarrior 2 is not exactly canon either due to it's plot outcomes
WAT
In MW2's main menu, before you start playing, you can read loooooong histories, straight from Clan Jade Falcon and Clan Wolf sourcebooks. The scenario briefings and debriefings in the campaigns use passages straight out of
The Falcon and the Wolf scenario book, IIRC there might have been passages from
Bred for War and
I Am Jade Falcon as well. Uncanonical much? Yes, you are not usually fighting in those battles directly, but are on the sidelines instead, so you could well have been the "third guy from the left" in the big picture - ristars got the honour while you did the real work. Apocryphal, but not in conflict with canon.
The two campaigns are built so that whichever side you choose "wins", but both endings
are canonical, it's just the same story from different perspectives. The Jade Falcons
did win the Refusal War, quiaff? Because that's their ending. But even then you are told that the Warden Wolves
did manage to escape to Inner Sphere where they were granted a fiefdom in exchange of their services. Because that's their ending. Because the campaign is completely linear, you don't get to win the Jade Falcons as a Wolf no matter what you do, nor can you choose to be a Crusader instead of a Warden (soon-to-be Wolf-in-Exile). And as a Falcon you cannot prevent the Warden Wolves from escaping.
Of course, the voice-over in the Jade Falcon ending cutscene implies that they would break the Truce of Tukayyid, which is exactly what they want to do in the books as well (having "proved" Ulric's treachery through the Trial), but they are too weak to do that even though they were victorious (which had been Ulric's plan all along). Yes, the voice-over of the Wolf campaign states that they are the last of the Wardens, but this is
before the Great Refusal, before the Ghost Bears become Warden and merge with Rasalhague, before the Nova Cats defect, before the Diamond Sharks become Warden and relocate to the Inner Sphere, and before the Snow Ravens join the Outworlds Alliance.