Btw moat caitlin in this episode is why the north has never been conquered by non dragon riders, the only way you can acess the rest of the north with horses is through Moat caitlin because everywhere else is swampy, its why in the books when Ned sent Caitlyn back to winterfell after learning about the knife attack on bran, in the books he told her ""Once you are home, send word to Helman Tallhart and Galbart Glover under my seal. They are to raise a hundred bowmen each and fortify Moat Cailin. Two hundred determined archers can hold the Neck against an army. Instruct Lord Manderly that he is to strengthen and repair all his defenses at White Harbor, and see that they are well manned. And from this day on, I want a careful watch kept over Theon Greyjoy. If there is war, we shall have sore need of his father's fleet.", it shows how great of a battle commander Ned was but unfortunately Caitlyn saw Tyrion on her way back and decided to kidnap him before following Neds instructions