A moratorium is in effect on adding information from Fire and Blood until December 20th.
Defender of the Marches
The Kingdom of the Reach once included western marches from Horn Hill to Nightsong. While most of the Dornish Marches are now in the stormlands, there are some marcher lords within the current Reach, such as House Tarly of Horn Hill. Starpike, the seat of House Peake in the Reach, may also be part of the marches.