Tywin of the House Lannister, Lord of Casterly Rock, the Shield of Lannisport and Warden of the West had been born a strong son to a weak man. Tytos Lannister had openly been called the Toothless Lion and the name was not unfounded. For all that Tytos had done, he had nearly destroyed the near-limitlessly wealthy House of Lannister, and Tywin had been the man to build the Golden Lions back to their place of prestige.

His children had destroyed his work with a simple act. Tywin refused to believe the rumors that his children had committed this foul deed, that his legacy was a lie. But as the tide turned against him, the mutterings began to get louder and louder. And he overheard his own Captain of the Guard saying he witnessed Jamie and Cersei embracing once in Casterly Rock.

Tywin had of course had the man immediately killed for such slander, but it had kept him awake that night. Could it be true? Had his golden twins failed him so?

Tywin had once commanded the favored side in this war, and now in the space of a fortnight he had become the underdog, the man set to fail. Robb Stark was a boy and Tywin had lost every battle to him. He had not only been claimed King by his Northmen but by the Riverlords, the Reachmen and the Stormlords in turn. The bannermen of House Arryn had known Ned Stark well and would support his son when the time came for it, and all the boy would have to do to gain Dorne would be to sell Tywin's head to Oberyn Martell.

The knowledge that he was about to be remembered as the man who lost the Lannister dynasty to a boy-king did nothing but drive the Lion Lord further on. He would not yield. He would fight on, he was a lion. He was the lion.

That was what he told himself until he learned that Joffrey had been executed, Tyrion attacked, Cersei imprisoned and half the great castles of the Westerlands seized and plundered for House Stark. Tywin had been in a black rage and ordered the immediate abandonment of Harrenhal. Once in the safety of Casterly Rock, the Wolf's Pup had no hope of catching Tywin. The Lord of the Westerlands simply needed to outride Robb Stark and evade the Northmen, who by all accounts from his scouts were marching on Kayce. It was a gamble, but with Tywin having no other card to play, it was a gamble he had to take.

That was what he reasoned to himself as he rode at the fore of this thirty-thousand strong host into the city of Lannisport. Relief threatened to wash over Tywin as he saw Casterly Rock loom over the great city like a safe beacon. He dug his heels into his horse to urge it to go faster as the host began to march down a steep hill towards the main street of Lannisport.

"Sound the horn, I want the gates opened." Tywin said to his brother Kevan who nodded warily, and signaled to the horn-blower who made to raise the horn to his lips only to stop as a different war horn began to blow ominously from the center of Lannisport. At first the Lannister army did not realize anything was amiss until, yells and shouts began to form as the men noticed a great cloud of black smoke rising from the center of the city.

"Tywin-…it's the manse-…" Kevan began only to be cut off as another horn began to echo from the forests behind the army on the River Road. Tywin's heart seized in his throat as the army began to get confused and panic. The remaining Western generals worked to regain control of the men and form their lines as a third horn began to sound from the east. A horn that sent a chill down the spines of Tywin Lannister and his army.

"TO ARMS!" Tywin roared after a beat of silence. The bells of Casterly Rock began to toll as Northmen flooded out of houses, shops, manses and other buildings of Lannisport to charge towards the Lannister army, a mounted force of Northmen rode from the beach with a fury that could not be contained. The Greatjon himself killed four Lannister cavalrymen within moments with unnatural agility for a man of his size. His sword had been almost a silver blur as he hacked and slashed his way through.

From the rear, Edmure Tully's cavalry charged through Tywin's unsuspecting footmen with a bloodthirsty vengeance. The Riverlords and the Northmen flew the banners of a grey direwolf upon a white field, which became more and more prevalent throughout the chaos as the two armies worked their way through the Western Force towards each other. The Lannister standard was abandoned or trampled upon, multiple bolts of red and gold cloth fell by the hundreds as the Wolf overcame the Lion.

From the east, King Robb Stark sat mounted on his horse atop a hill, looking down at the initial skirmish. His southern army was gathered behind him like lava waiting to flow down the mountainside, with a single movement, Robb unsheathed Ice from the scabbard on his back and with great strength lifted the sword skyward towards the battle.

"FOR WINTERFELL!" Robb roared as he led the men down the mountainside. It was a monumental sight, had anyone been watching, as an army so large it could not be comprehended swallowed the mountain and the filed to move towards the battle and the city. A few other buildings by now had caught afire, and any Lannister standard that was seen hanging was instantly set ablaze by beserking Northmen.

The southern army split in two as they reached the bottom of the mountain to join the Northmen heading for the rear and the Riverlords heading for the fore. Robb himself was galloping towards Casterly Rock where he knew Tywin Lannister would be.

Ice in his hand, Robb managed to cut through the armored soldiers of House Lannister with ease, and his reputation caused many of the men-at-arms to flee when they saw the Young Wolf charging towards them. Grey Wind was sprinting beside Robb to leap and charge at the back of Gregor Clegane who had killed almost thirty to forty Northern and Riverland soldiers around him. Clegane fell straight onto his face as Grey Wind mauled at his back before charging onwards to attack other red cloaked men. Clegane struggled to get up, and his disadvantage was used by a group of Northern and Reach soldiers who overwhelmed the Mountain and attacked him fiercely until Clegane was bloodied and unconscious in the mud.

Robb's orders were precise, and every man knew their duty. Beside him, Ser Garlan and Smalljon Umber were his guard as Tywin Lannister's armored form came closer and closer towards them.

Casterly Rock acted as fast as they could, opening the gates of the castle to allow the entire reserve force of House Lannister to join the battle, where they gained initial ground by attacking the Northmen from the rear. A moment passed before the reservist forces began to join their allies in being horribly destroyed by the united army of King Robb Stark.

Tywin Lannister seemed to be watching everything in slow motion, from the deaths of hundreds to thousands of his red-cloaked soldiers, to the charging of fierce-bearded Northmen and tall, strapping Rivermen. He could not respond as his brother Kevan was dragged off his horse and placed in shackles, he said nothing as his lords bannermen were feathered by arrows or cut in half by the Young Wolf's monstrously large greatsword. The sight of Robb Stark caused Tywin to grit his teeth and move forward, sword in hand. This damned boy had ruined everything. He'd killed his grandson and taken his children prisoner. Lannisters were not weak enough to be taken by this boy!

Tywin roared, charging forward to Robb Stark with his sword raised. He saw a flash of grey on his left before a huge force knocked him off his saddle and into the mud and blood of the battlefield. The direwolf gave Tywin a single, deep swipe across the face before charging off once more. Three lines of blood began to seep across his as Tywin's clutched at his head in pain.

Robb Stark's horse stopped just above the Lion Lord, covered in dirt and blood as his army and legacy fell around him. Ser Garlan, Smalljon Umber and his father the Greatjon, Ser Edmure and Ser Brynden Tully joined Robb to encircle Tywin with their horses.

"Tywin Lannister. As King of the First Men, the Andals and the Rhoynar, Lord of the Seven Kingdoms and Protector of the Realm, I hereby arrest you on the charges of high treason. Take him." Robb ordered, causing Garlan and Smalljon to dismount their horses and move to roughly take Tywin Lannister into custody.

Robb looked behind him to see that Tywin's remaining army of only a few thousand surviving men had surrendered amongst the piles of corpses. The United Army was falling back into rank to prepare their siege of Casterly Rock. Robb however had a feeling that they would face no opposition from the castle any longer.

His suspicions were confirmed just under an hour later when he sat on his horse at the gates to see that those inside the Rock had struck the banners of House Lannister and replaced them with peace banners.

"Who is castellan of this castle?" Robb asked as he led the mounted party into the castle to accept their surrender. A blonde man, who looked to be twenty to thirty years older than the Kingslayer walked forward to collapse to his knees before Robb.

The Young Wolf landed his feet on the ground to walk around and face the man who was known as Ser Damon Lannister, exchanging a glance with his Lords as he did so.

"Mercy, sire. Mercy. Casterly Rock is yours. We yield, we yield!" Damon Lannister stammered, clasping his hands over his head to beg Robb.

"Rise, ser. Your household will prepare to host my army." Robb ordered after a moment of glancing around at the terrified castle servants, his words causing Damon to vigorously nod, turning on his heel to yell at the servants to prepare a feast. Robb himself was covered in blood that was not his and was filled with an immense sense of satisfaction and pride as he looked at the proud, beaming faces of his lords.

"We have won." Robb declared on the steps of Casterly Rock's main hall. The Greatjon roared his approval first, causing his horse to trot nervously as the other lords joined in.

"THE KING FROM THE NORTH!"

"THE KING FROM THE NORTH! THE KING FROM THE NORTH!"

Author's Note: The Battle for Lannisport. An awesome battle of Robb Stark's three armies taking on Tywin before the walls of his own castle. I feel like this is payback for Tywin melting down Ice and turning it into "Widow's Wail" and "Oathkeeper".

Now Robb is preparing the United Army to march North.