After hearing of the death of his father Ned, the oldest Stark son was enraged and attacks the Lannister army with the Stark forces and those who are allied with his mother, Catelyn Stark. During a battle, the Stark forces capture Jaime Lannister, Cersei's brother. The Starks' allies discuss what to do and finally decide to separate from the country of Westeros and establish a new country in the northern region, declaring Robb the king of the North.

Courtesy of HBO