Again i feel like people are blaming Sansa Stark unfairly. Just like in the 1st season people think Sansa caused Ned’s death by grassing on Ned (which I don’t think really happened considering Ned walked up to Cersei in the courtyard and completely implied that he knew Joffrey was not Robert Baratheons son), now they are saying Jon wouldn’t have lost so many men if Sansa had told him about Littlefinger’s army. Firstly, she didn’t actually know if Littlefinger was even going to come, secondly she didn’t tell Jon that Littlefinger might come both because she didn’t want to get people’s hopes up and because she knew that the element of surprise was a very important factor when fighting Ramsay, which she warned Jon about (saying that Jon shouldn’t act in the way Ramsay wants him to) and which Jon chose to ignore. This was made clear when despite Davos’ advice to be patient and wait for Ramsay to come to them, he was drawn in by Ramsay’s ploy with Rickon (which Sansa probably knew would happen) and went charging ahead. Lastly, i think it’s important to recognise that Sansa was thinking like Littlefinger would. She knew that something could go wrong because Jon didn’t know how Ramsay fought, and she knew Jon still hadn’t given up on Rickon which could and did cause him to make mistakes, so she calculated that instead of losing the Vale army to the potential of Jon’s mistakes (which, as we saw, would have happened, not that I’m blaming Jon, he just really didn’t know Ramsay like Sansa did), she instead used the element of surprise and won the battle as Littlefinger would have. I’d also like to add that Jon still really hasn’t seen as much of the world as Sansa has. He has been surrounded by honour and oath-keeping all his life, he still believes as Ned did that being honourable and good means the good will win despite all odds. Sansa, however, knows that the good don’t win by default, that no one can protect you and you must do what is necessary to survive. And as we saw, Jon would have died as Ned did, honourably, but still dead. Whereas Sansa has survived as Littlefinger has. It’s up to each individual to decide if dying with honour but staying true to yourself is better or worse than surviving by playing the game but as a result, losing bits of your integrity, as Sansa could be losing as seen by her smile at the end when the dogs tore up Ramsay, (which I think Arya would approve of, but Ned would probably have preferred to grimly take his head off without taking joy in his death as Sansa did). Sorry for the long essay, just watched the Ep and read reviews/comments and people are calling her an idiot unfairly, not even commenting on Jon’s actions (which are just as understandable as Sansa’s). Thanks for reading! :) also some bad grammar in my post but cbs correcting.