Oops! This image does not follow our content guidelines. To continue publishing, please remove it or upload a different image.
House Tyrell is a powerful noble house. The Reach is the most populous region of the Seven Kingdoms and the Tyrells can field the largest army on the continent, although the Lannisters, being richer, can better-equip their troops. This makes the Tyrells formidable enemies but excellent allies.
House Tyrell never ruled as "kings and queens", as opposed to the Starks, Lannisters, or Arryns. Before King Aegon I Targaryen's invasion and unification of the Seven Kingdoms, the Tyrells were stewards to House Gardener, the Kings of the Reach. The Tyrells had responsibility for maintaining the castle of Highgarden, the seat of royal power in the Reach. In the battle known as the Field of Fire, King Mern IX Gardener and all of his issue were burned alive by Aegon's dragons. Harlen Tyrell, King Mern's steward, surrendered Hightower to King Aegon and was rewarded with the title of Lord Paramount of the Reach and Warden of the South.
House Florent of Brightwater Keep has long disputed the suitability of the Tyrells to the rule of the Reach, on the grounds that they can claim a closer blood-relationship to the old kings of House Gardener. House Florent is a cadet branch of House Gardener, founded by a younger son of the main Gardener line, while House Tyrell can only claim descent from House Gardener through the female line.
As a result the Florents have often bucked the authority of the Tyrells in the past three centuries since the Targaryen conquest. It came as little surprise when after Renly died and House Tyrell led their vassals in switching to support King Joffrey and the Lannisters, House Florent was the only major House from the Reach to instead switch allegiance to Stannis. Indeed, Stannis's wife, Selyse, is herself a Florent.
Thus the Tyrells, while always maintaining firm control of the Reach, have always feared that they have an uneasy grip on their rule. While the Tyrells possess very fertile lands from which they can raise large armies, there are other powerful noble families in the Reach, such as House Florent, which don't particularly respect them the way the vassals of the Starks and Lannisters respect them because they used to be their kings. A great deal of skill at court politics has thus been needed to keep the Tyrells' powerful vassals in check, though Tyrells like Lady Olenna possess this in abundance. Therefore, House Tyrell is always on the lookout to secure a marriage into a royal line, to strengthen their prestige and cement their rule over the Reach.
The Martells and Tyrells have been sworn enemies for many generations. Over the centuries, they have fought border wars beyond count, and raided back and forth across mountains and marches even when at peace. The enmity between the two houses waned a bit after Dorne became part of the Seven Kingdoms, but the maiming of Willas Tyrell by the Dornish prince Oberyn Martell in a joust fanned the animosity between the families, though Willas himself does not hold any grudge against Oberyn, as both men knew what happened was simply an unfortunate accident.
