- "I think it's safe to say the feeling is mutual. There's been enmity between the two Houses for as long as anyone can remember. I don't doubt someone killed someone, which led to more killings of someones and then, well... here we are."
- ―Maester Ortengryn to Gared Tuttle on the Forresters and Whitehills' relationship
The Forrester-Whitehill conflict is a minor conflict within the War of the Five Kings. It occurs following the Red Wedding between two old rival Northern houses, House Forrester and House Whitehill, and is the subject of Game of Thrones: A Telltale Games Series.
Much like the Blackwoods and Brackens, the Forresters and Whitehills have held an ancient grudge for centuries, although this wasn't always the case. Within in the Wolfswood lies the largest Ironwood forest in Westeros, a strong and highly sought after wood. The Forresters have been the traditional craftsman of ironwood, while the Whitehills once had it, but their forests were stripped bare. The Whitehills blame the Forresters for giving them barely any, while the Forresters believe the Whitehills squandered their share.
At the wedding of Edmure Tully and Roslin Frey, the Whitehills and Forresters are both present. The Northern army is annihilated and Robb Stark is killed. The Whitehills join the Boltons and Freys in the slaughter of the host. The Forresters' best men, as well as Lord Gregor Forrester, are slain during the wedding, and Rodrik Forrester is presumed dead.
Gared Tuttle, the squire of Lord Forrester, escaped the Red Wedding along with the ancestral Forrester greatsword. He made the long journey to the Wolfswood and his family farm. Along the way he finds dead pigs and overturned carts. He then encounters two Whitehill soldiers and a Bolton man killing a pig, and Gared sees his injured father close by. The men notice him and a fight breaks out. Gared kills the Bolton soldier and, if the player chooses, one of the Whitehills, but Britt Warrick, the lead Whitehill, escapes to inform Lord Ludd Whitehill of the crime. Gared comforts his father as he dies, and mourns for him and his sister.
Following the deaths of his men, Lord Whitehill visits Ironrath, demanding the head of Gared. Gared has already been sent to the Wall, however, and Lord Whitehill announces that Ramsay Snow shall pay a visit to the Forresters. When Ramsay arrives, he hears out both Lord Whitehill and young Lord Ethan Forrester, the new head of the house. He decides to split the remaining ironwood forests between the Forresters and the Whitehills to see who fares better, and allows Lord Whitehill to install a garrison at Ironrath. When Ethan objects, Ramsay stabs him in the neck and gives Lord Whitehill Ethan's heir, Ryon Forrester, as a hostage, leaving House Forrester leaderless until Rodrik returns to Ironrath.
While he is training with Royland in the Ironwood grove, Rodrik receives a visit from Elaena Glenmore and her brother Arthur Glenmore. She says that Ludd Whitehill paid a visit to her father at Rillwater Crossing, requesting that Elaena marry Gryff to secure an alliance with the Glenmores. She asks that Rodrik help her get rid of Gryff. If Rodrik agrees, Arthur will loan House Glenmore's elite guard to House Forrester.
As Rodrik and Elaena prepare for their attack on the Whitehills, they hear that Gryff has attacked Maester Ortengryn for supposedly not treating one of his soldiers properly. The Glenmore soldiers prepare to ambush the Great Hall while Rodrik and Elaena confronts Gryff, who is surprised to see Elaena and threatens her. Rodrik summons the Glenmore elite guard and they easily ambush Gryff and his men, taking them into custody. Rodrik can beat Gryff almost to death in the process.
The traitor's identity is discovered. He reveals that Ludd plans to ambush Asher the moment he arrives in Westeros. Rodrik takes the Forrester army and rides to protect his brother. After a few weeks Asher finally arrives at White Harbor, but is immediately ambushed by Gryff Whitehill's soldiers. Either Rodrik or Asher are slain in the Ambush.
After Asher's escape at the Ambush at the Harbor (Determinant), he rides with the pit fighters to Ironrath Asher will order his men to stop down the road, and they stage an ambush for a group of Whitehill soldiers pursuing them. A dying Whitehill soldier will taunt Asher, and he can beat the soldier to death or leave him to die. Beshka will then talk to Asher about how she wishes she could have known Rodrik.
After either Rodrik or Asher escapes the harbor ambush, they quickly return home to Ironrath with the remaining men and pit fighters to prepare for the siege. The Whitehills arrived with around 500 men and starts besieging the Forrester's keep. The battle ended with the Whitehills successfully taking over Ironrath, but the victory wasn't without cost to them, as the Forresters managed to free Ryon from their custody. Harys and either their lord Ludd or Gryff Whitehill were killed during the battle. The cost however was far greater for House Forrester, having lost Ironrath and the majority of its occupants, including Lady Elissa, Maester Ortengryn, and either Duncan Tuttle or Royland Degore. Only three confirmed survivors of the house itself remain: Rodrik/Asher Forrester, Talia Forrester, Ryon Forrester and Mira Forrester, if she wasn't killed in King's Landing.