Trần Thủ Độ
In October 1224, Lý Huệ Tông decided to cede the throne to his second daughter, the Princess Chiêu Thánh, now the Empress Regnant Lý Chiêu Hoàng. Chiêu Hoàng was only six at that time so every important decision in the royal court was made by the Trần clan. Profiting from this circumstance, Trần Thủ Độ arranged a marriage between Chiêu Hoàng and Trần Cảnh, the eight-year-old son of Trần Thừa and the younger brother of Trần Liễu. With Trần Cảnh being the Empress Regnant's husband, Trần Thủ Độ was finally able to overthrow Lý Dynasty by making Lý Chiêu Hoàng pass the throne to Trần Cảnh, now Trần Thái Tông, in 1225.