 Complete the following phrase:  Trần Quốc Tảng was born as Prince Hưng Nhượng 興讓王, Vietnamese: Hưng Nhượng vương in Yên Sinh fief now Đông Triều District, Quảng Ninh as the third son of Trần Hưng Đạo, leader of Yên Sinhs line in Trần clan. After the 1237 event in which Trần Liễu, Trần Quốc Tuấns father, was forced by grand chancellor Trần Thủ Độ, to give up his pregt wife Thuận Thiên to his younger brother Trần Cảnh, an inherited hatred began to take form between the Yên Sinhs line of Trần Liễu including Trần Quốc Tuấn and Trần Cảnhs line including the emperors Thánh Tông and Nhân Tông. Before his death, Trần Liễu made his son Trần Hưng Đạo promise to revenge for him by taking over the throne but due to the situation of Đại Việt when the Trần Dynasty had to face with three consecutive 