Before the Targaryen Conquest, each of the Seven Kingdoms was ruled independently by a powerful royal family. During the conquest, these families were either destroyed, replaced, or defeated and made to swear allegiance to King Aegon, who reigned from the Iron Throne in King’s Landing.
The Tyrells, Greyjoys and Baratheons respectively replaced the Gardeners, Hoares and Durrandons. However, the Lannisters, Arryns and Starks surrendered peacefully and remained in control of their lands.
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