to Jaime to besiege the Riverlands' capital Riverrun. Tywin's half of the force battle a Northern host led by Roose Bolton at the Battle of the Green Fork, but in the meantime Robb Stark's men rout Jaime's army and take him prisoner. Tywin is named Hand of the King by the new king, his grandson Joffrey Baratheon, but Tywin decides to remain in the Riverlands to continue the campaign against the Starks, sending Tyrion to King's Landing as acting Hand in his stead. A Clash of Kings Tywin's at Harrenhal, using it as a base for the war in the Riverlands. When Joffrey's uncle and rival claimant Renly Baratheon is killed and Joffrey's other uncle Stannis Baratheon besieges Storm's End, Tywin decides to use the distraction to march west in pursuit of Robb's army. Robb intends for Tywin's army to be gradually dismantled by the long march, but Robb's uncle Ser Edmure Tully, unaware of the plan, confronts Tywin's forces at the Battle of the Fords. Although Tywin suffers heavy losses, the delay in his march allows him to receive word that Stannis is now marching on King's Landing. Tywin quickly leads the army on King's Landing, joining forces with Renly's former bannermen House Tyrell along the way, and arrives at King's Landing in time to force Stannis to retreat. Joffrey subsequently names Tywin Hand of the King, for the second time, and declares him "Savior of the City". A Storm of Swords Tywin assumes his role as Hand of the King, demoting Tyrion to Master of Coin. He forces Tyrion to marry Sansa Stark, though his efforts to have Cersei wed to Willas Tyrell are rebuffed. Having learned that Robb has invalidated a marriage proposal to House Frey by marrying Jeyne Westerling, Tywin enters into communications with Lord Walder Frey and Roose Bolton (who has lost faith in Robb after Theon Greyjoy's capture of Robb's castle Winterfell). The three conspire to have Robb and his army slaughtered while camped at The Twins for Edmure Tully's wedding, and the War of Five Kings results in victory for House Lannister. However, Joffrey is poisoned soon after during his own wedding. Tyrion is accused of the murder, ultimately being found guilty and sentenced to death. Jaime and Varys release Tyrion from his cell, Jaime confessing that he felt compelled to do so for lying about Tysha, Tyrion's first wife, who had been