The Reyne Rebellion was an uprising which occurred in the Westerlands, when House Reyne of Castamere rose up against House Lannister of Casterly Rock. House Reyne perceived that their Lannister overlords were weak, due to the incompetent leadership of the House's current head, Tytos Lannister, the Lord of Casterly Rock and Lord Paramount of the Westerlands. The sigil of House Reyne was also a lion, but a red one instead of the golden lion used as the sigil of House Lannister. The rebellion of the Reynes against the Lannisters was thus symbolically seen as a clash of lions.