Death of Meraxes

"Rhaenys returned on Meraxes, intent on avenging herself against Meria Martell, but Dorne was no longer empty. The Dornish kept Meria's promise and fought even while burning under dragon flame, and they won. One day a bolt pierced the eye of Meraxes and knocked the dragon out of the sky. House Martell remained unbroken, unlike the unfortunate Rhaenys."

- Varys The Siege of Hellholt was one of the most important battles of the First Dornish War, which resulted in the death (or capture) of Rhaenys Targaryen, the youngest of the sister-wives of Aegon I.