Tran Canh was the son of Tran Thua and nephew of Tran Thu Do, who was the commander of the capital's guards of the Ly Dynasty. During that time, Ly Hue Tong, the Ly emperor, was having some mental trouble and he could not rule properly. Therefore, he let his daughter succeeded him when she was only 7 years old. At that time, Tran Canh was about 8 years old, whose main job was to serve as a servant to the 7 years old emperor Ly Chieu Hoang. They soon became good friends because of their similar ages and interests. Seeing this friendship as a chance to take over the throne, Tran Thu Do made the couple married. The next year, Ly Chieu Hoang gave up the throne to her husband, thus ending the Ly Dynasty in 1225.

Tran Thai Tong was a great ruler. During the Ly Dynasty's final years, things were either delayed or came to a complete halt due to war and improper leadership. However, once Tran Thai Tong enthroned, he put things back in order. Firstly, he strengthened the army, improving both in quantity and quality. Secondly, he readjusted the tax rates accordingly so everyone was content. Thirdly, he improved the economy by helping farmers and building dikes to prevent flood. He also paid great attention to education, and gave the first national exam in 1232. After years of chaos and war, the country was now stablized. Thai Tong was not only a good ruler in time of peace, Thai Tong was also a warrior. In 1252, he himself led an invasion to Champa and scored a great victory. In 1257, he was in the frontline again, fighting the Mongols when they invaded Vietnam that year. He defeated them badly at Dong Bo Dau, ending the first Mongol invasion. In 1258, he abdicated and gave the throne to his son. He started a very good tradition where an emperor would give up the throne when he was still alive and let his son succeed. By doing this, he still had control over the court, while at the same time prevented succession wars among the princes. He died in 1277.

None. Tran Thai Tong was a gentle ruler while at the same time a great warrior. He was not perfect, as all human beings, and made a few mistakes. However, overall, I would give him a 9 out of 10.