<P> When his father leaves for King 's Landing to be made King Robert Baratheon 's Hand , Robb becomes acting Lord of Winterfell . After his father 's arrest for presumed treason , he marches south with an army in attempt to free his father . To secure passage through the Green Fork at the vital crossing of the Twins , Robb consents to the marriage to one of Walder Frey 's daughters or granddaughters negotiated by his mother Lady Catelyn Tully . After crossing the river , he surprises and destroys the Lannister army besieging Riverrun , capturing Jaime Lannister in the process . Upon hearing of his father 's execution at King 's Landing , Robb is crowned the King in the North by his bannermen , and the Riverlands lords also swear loyalty to him . </P>
<P> When his father leaves for King 's Landing to be made King Robert Baratheon 's Hand , Robb becomes acting Lord of Winterfell . After his father 's arrest for presumed treason , he marches south with an army in attempt to free his father . To secure passage through the Green Fork at the vital crossing of the Twins , Robb consents to the marriage to one of Walder Frey 's daughters or granddaughters negotiated by his mother Lady Catelyn Tully . After crossing the river , he surprises and destroys the Lannister army besieging Riverrun , capturing Jaime Lannister in the process . Upon hearing of his father 's execution at King 's Landing , Robb is crowned the King in the North by his bannermen , and the Riverlands lords also swear loyalty to him . </P>
who did robb stark marry in season 2
who did robb stark marry in season 2
one of Walder Frey 's daughters or granddaughters
one of Walder Frey 's daughters or granddaughters