- Kevan Lannister: "Scouts assure us that Robb Stark remains north of Ashemark."
- Tywin Lannister: "The last time the scouts assured us of Stark's movement he lured us into a trap. Which is why my son is his prisoner. Too close to Casterly Rock."
- — Tywin Lannister predicts the inevitable to Kevan Lannister [src]
The northern army led by Robb invades the Westerlands, surprising the host led by Ser Stafford Lannister at Oxcross and annihilating it. With the bulk of the Lannister force stationed at Harrenhal and the remnants of Jaime's army already scattered, the Westerlands are largely defenseless.
In the books
In the A Song of Ice and Fire novels, it is mentioned that Ashemark is easily sacked by Robb's army, and the keep's castellan is killed. Lacking the necessary strength to capture Casterly Rock or Lannisport, the Northern army raids the Westerlands: Galbart Glover and Rickard Karstark raid along the coast, Maege Mormont captures thousands of livestock, and Greatjon Umber - who in the novels remains with Robb - captures the gold mines at Castamere, Nunn's Deep, and Pendric Hills.
|Scourging of the Riverlands:|
|The Young Wolf's campaign:||
Battle of the Green Fork · Battle of the Whispering Wood · Battle of the Camps · Liberation of Raventree Hall · Liberation of Stone Hedge · Battle of Oxcross · Sack of Ashemark · Battle of the Yellow Fork · Surrender of the Crag · Liberation of Harrenhal · Battle of Stone Mill · Red Wedding
Execution of Eddard Stark · Massacre in King's Landing · Riot of King's Landing · Battle of the Blackwater · Purple Wedding · Court trial of Tyrion Lannister · Second trial by combat of Tyrion Lannister · Assassination at the Tower of the Hand
|Ironborn invasion of the North:||
Fall of Moat Cailin · Raid on Torrhen's Square · First Battle of Deepwood Motte · Fall of Winterfell · Sack of Winterfell · Assault on the Dreadfort · Surrender of Moat Cailin · Second Battle of Deepwood Motte
|Rise and fall of the Sparrows:|
|War for the North:|
|Coup in Dorne:|