User blog:Rodrimuri/Robb Stark Army

Good, I wanted to ask a question: in episode 3x01 " Valar Dohaeris " Robb Stark arrives Harrenhal with his army. On page of the Liberation of Harrenhal puts the army Stark is 6,000 horsemen from the north, but the scene is clearly seen as the army is much higher counting large numbers of northern infantry. One could know how many men had the King in the North in his army ?