(June 21, 2016 at 6:41 am)SteelCurtain Wrote: I don't think she knew for sure the knights of the Vale would show.
Well, then it would have been smarter to find out before attacking Winterfell, wouldn't it? Or at least tell Jon about the possibility - however remote it may be - in order to convince him to wait a bit longer, before facing the Boltons - which is exactly what Sansa was trying to do early in the episode. It's really weird, that she kept such an important fact from Jon and yet expected him to make sound strategic decisions. Especially, that Littlefinger's army could have been an even bigger threat than the Boltons, if he decided to turn against Sansa and Jon, even if they somehow defeated Ramsey. Seems like useful information to someone, trying to plan a battle.
And by the way - how come nobody noticed the Knights of the Vale stationed at Moat Cailin for who-knows-how-long? I mean - if I'm not mistaken - Theon managed to travel half the world since Littlefinger showed up in the North. And the last we saw Moat Cailin was when Theon convinced the crew of the castle to surrender to Boltons. So the Knights of the Vale were stationed in a Bolton castle, right on the way to Winterfell and Ramsey didn't suspect anything? And neither did Jon hear, or wonder about it, while traveling around the North, trying to gather support?

"The fact that a believer is happier than a skeptic is no more to the point than the fact that a drunken man is happier than a sober one." - George Bernard Shaw