Eddard (351)

In this chapter we find out that King Robert is not the friend that Ed grew to love, and that power is more important than honor. The king makes the decision to send people to kill Daenerys since she is now pregnant. Ned is completely against that decision and it results in himosing his position as Hand. Ned is also threatened by the King and so him and his family must leave immediately. With the new revelation that Catelyn has taken Lord Tyroan as her prisoner,we see a rise of anticipation and the thought of war is crossing everyone's mind. 

This chapter is very important as we see close ties break between Ned and the Ming, and we also see a lot of Stark vs. Lanister conflict. Add the fact that Daenerys is preto into the mix, it is not looking like the 7 kingdoms will stand much longer.