House Stark had claimed dominion of Casterly Rock and the plunder seized from the Westerlands as royal bounty, to be rewarded or held as Robb saw fit when the war was over. For a day and a night the United Army of King Robb Stark feasted and recuperated at Casterly Rock.
One thing that worried Robb was the revelation that had occurred the day after the Battle of Lannisport.
A small child, one of the castle servants had approached the King while he feasted. And without saying a word had dropped a scroll into Robb's lap. When unfurled, the message had detailed which Lord had betrayed Robb and forged an alliance with Tywin Lannister.
It was as Robb had suspected.
Roose Bolton.
On the second day following the Battle of Lannisport, Robb had given order for the new royal fleet to divide and sail around the coasts. Fifty ships went along the east coast towards the North, while ninety ships sailed along the west coast where the majority of the Ironborn strength was anchored. Robb had given leave for the Greatjon to lead the Northern Army along with ten thousand foot soldiers and seven thousand cavalry from the Reach and Stormlands towards Moat Cailin with all haste that morning. Robb had tasked the Greatjon with a mission of great import; ambushing Roose Bolton and his men. Robb would not tolerate another Bolton uprising again. If he was taking the Iron Throne by force, he would settle all matters of strife across the Seven Kingdoms once and for all.
The Greatjon would capture Roose while putting the rest of his men to the sword, Robb would then execute Roose Bolton for his treachery, as he would do to Theon Greyjoy and Petyr Baelish once the North was reclaimed.
As Robb made his way down to the dungeons of the castle, the Riverlords led by Robb's uncle Ser Edmure and another twenty-odd thousand men from the southern army was preparing to march North.
Robb himself would lead the last wave of the army later that afternoon, as soon as he finished his business with the Lions of the Rock.
Tywin Lannister and his family were arrested and kept in the deep dungeons of their own castle at Robb's orders where they were shamefully languishing as a result of Tywin and his children.
Jaime Lannister, who Robb had left with the Northern Army throughout the campaign had now joined his father in a cell, where the two lions had reportedly remained silent, until Robb appeared before them.
Jaime launched himself at the bars of his cell to spew profanities and curses on Robb for killing Joffrey and harming Cersei.
"All you do is prove that you were his father and her lover." Robb said calmly when Jaime's rattled off into a silence after a while. Jaime turned purple with rage at Robb's words and shook the cell furiously.
"Let me out, Stark! Let us settle this once and for all! You fight for the Starks and I fight for the Lannisters. You pick the weapon, boy!" Jaime spat, causing Robb to laugh.
"Settle what? You have fallen. You have failed. I have taken your castle away from you, I took King's Landing and I killed Joffrey. Cersei herself poisoned Tommen with-."
"YOU LIE!" Jaime roared, slamming his fists against the bars and causing Robb to simply shake his head.
"Gather your wits, Kingslayer. For you will need them to listen to what I am about to say. House Lannister's reign is over. Cersei is a prisoner of my betrothed in Highgarden, I was crowned by the High Septon on the Iron Throne before I took Joffrey's head, you have no men or influence left anywhere." Robb stated pacing before the cell to look mostly at Tywin who glared at Robb with hard green eyes.
"Tywin Lannister, for your crimes against the realm, I strip you of all lands, titles and holdings. You are to be taken back to King's Landing where you will be given to House Martell to answer for the murder of Princess Elia Targaryen and her children." Robb's words caused Tywin to smile coldly.
"Smart boy." Tywin said simply, before leaning back to fold his arms.
"Jaime Lannister. Lord Rickard Karstark has petitioned for your head for the murder of his sons. I am of a mind to give it to him. Instead, I am giving the both of you a gift. Lord Rickard will be left alone with you for ten minutes, you will be bound and gagged. He will beat you senseless." Robb explained as though they were talking about taking a casual ride.
"And my gift, Stark…?" Jaime asked testily, grasping the cell doors.
"Life, Jaime. I let you live. I have managed to convince Lord Rickard that I will present you with two choices. Be executed by him, or face a brutal beating and be exiled to the Wall to spend your days as a man of the Night's Watch. What will your decision be?" Robb asked calmly, his hand on the pommel of Ice as he looked between father and son.
"You won this war by blind luck, boy. But your reign won't last. Daenerys Targaryen lives, and I pray to all the Gods than when she lands, she burns you and that whore Margaery Tyrell first."
"Sweet words, Ser Jaime. I'll ensure Lord Rickard's surviving son joins him when they knock your teeth in. Good day to you, Lannisters. Thank you for the excessive amount of gold and jewels you've hoarded over the years. It will certainly assist the repayment of the Iron Bank." Robb called as he turned on his heel to march away from the dungeon cell.
"Oh and one last thing. After Cersei and Joffrey tried to have him killed, Tyrion decided to swear his loyalty to me. After this war is done, I intend to name him Lord of Casterly Rock. Hope that realization sits well with you, Tywin." Robb said with a smile, before finally turning to walk up the stairs and leave the Lannisters to process their fates.
"I have no children." Tywin finally muttered, earning an eye-roll from Jaime.
"Oh shut up, you old fart."
Robb, the Blackfish, Smalljon, Dacey, Daryn Hornwood, Patrek Mallister and Robin Flint were standing outside one of the ancient torture chambers of Casterly Rock listening eagerly as Rickard Karstark and his son Harrion viciously attacked Jaime Lannister.
"I believe that's long enough, Your Grace, We don't want him to die yet." Brynden Tully finally said, earning a groan of disappointment from the crowd before Robb knocked on the door causing Rickard and Harrion to stop.
When the door opened, the Karstark men were breathless and looking enormously satisfied.
"Take your leave. Now." Robb commanded of them, before walking into the room to see that Jaime was covered in cuts and bruises as he lay drooling on the ground.
"Well. You look like you could use a Maester. I wonder how long my brother was lying at the bottom of that tower you pushed him off before help came for him. I hope you wonder that too as you lie here, Kingslayer." Robb said, walking out of the room as Jamie spat out a blood-soaked tooth.
Robb was angry, but he was not cruel. For one of the Maesters did move in to attend to Jaime not long after Robb left the room. His own satisfaction over the Lannister men was attained, Robb now set his sights on home. On Theon Greyjoy and the Iron Islands.
Leaving behind a garrison of five thousand men to hold Casterly Rock and one thousand to escort the Lannister hostages to King's Landing, Robb marched out of King's Landing with the remaining faction of his united army. If all had gone well, Ser Rodrik had bled the Ironborn at Moat Cailin from the North.
Author's Note: Glad everyone likes the story :)