Trần Thái Tông
The Lý dynasty married its princesses off to regional rivals to establish alliances with them. The Lý family married one of their princesses (Lý Chiêu Hoàng) to a member of the Chinese Trần (Chen 陈) clan, Trần Thái Tông. This then enabled the Trần to topple the Lý and establish their own Trần dynasty.