User blog comment:Bbretterson/Infographic: Blending Telltale's Game Series with the HBO Show/@comment-26569935-20151113002644/@comment-5014364-20151113190425

At Joffrey's wedding feast, not the ceremony itself.

Robb Stark never wanted to claim the Iron Throne. He wants to split off the North from the Iron Throne as an independent kingdom (Talisa asks him about this in dialogue in Season 2 - and he reveals that he really doesn't have a political plan for who should sit the Iron Throne, even if they manage to kill Joffrey. Robb isn't politically skilled.)

Robb isn't "marching to King's Landing" eithier. The main Lannister force is at Harrenhal screening any march east to the capital. Robb's plan was to try to lure the Lannister army back west by invading the Westerlands (which we see in Season 2, at Oxcross). But Tywins wasn't stupid enough to take the bait. After Tywin defeats the Baratheons to the south, he can just wait out Robb through simple attrition (explained in episode 303), and Robb explicitly states in episode 305 that they have no plausible hope now of ever attacking King's Landing head-on.

That happened a lot in interviews, circa Season 2: "Who should sit the Iron Throne" is not a synonym for "who should win?" -- the Starks and Greyjoys were independence movements. Yara Greyjoy isn't trying to sit the Iron Throne...though the Seastone Chair as Queen of the Iron Islands is another matter...