Following the death of Aeyron Archer and the subsequent succession to the throne by Queen Rhae, the kingdoms are absolutely shattered. Many of the kingdoms did not come to Aeyron's support and even his most loyal supporters had turned on him (e.g Ignis Swyft), now Rhaenerys Blackfyre has to pick up Aeyron's pieces of his kingdoms. But for Rhaenerys to gel the kingdoms together is going to be a completely impossible task, she somehow has to mend The North, the Proudlands, the Dawnlands, The Hunter's Gift and The Waterlands together. Each kingdom has their own grievances - The North probably don't care about Rhae due to the Others, The Proudlands had their long time lord killed by his son and now his sons are in a feud, The Dawnlands just had their own king killed, Hunter's Gift was a front in the war and Hunter's Hill was partially destroyed, The Waterlands had their Queen disposed off. There also is The Bronze Isles who want independence from Rhae and she must grant them it or they will reject her and turn hostile, not only does she have to repair all of this damage but she had to do it before The Others decimate everyone.
The Seven Kingdoms are FUCKED. The Others have broken down The Winter Waste and are marching down to kill everyone and no one is united; it seems that Rhaenerys may fail in uniting the kingdoms and the feat will have to land on Gerold Forrester who has just united the wildlings and the Northerners. We mustn't forget that the Kingdoms have gone through 2 wars in the span of 2 years AND they had another war 7 years ago, so they've had 3 wars in the last 10 years - they are majorly fucked. The 7 Kingdoms in their current space seem like they are going to get steamrolled by The Others, hopefully the Blackfyre dragons can severely aid them because they need it.