The Targaryen civil war, known as the Dance of the Dragons, was a conflict that took place in the Seven Kingdoms of Westeros during the early 130s AC. It was fought between rival factions of the Targaryen family, primarily between Princess Rhaenyra Targaryen and her half-brother Aegon II Targaryen, over the Iron Throne. The war was marked by brutal battles and significant loss of life, including the deaths of many dragons. The civil war lasted for several years and resulted in the weakening of the Targaryen dynasty. Ultimately, Rhaenyra was betrayed and killed, while Aegon II faced his own downfall. The conflict had lasting effects on the realm, leading to a decline in dragon numbers and altering the power dynamics within the Seven Kingdoms.