An Dương Vương

An Dương Vương is the title of Thục Phán, who ruled over the ancient kingdom of Âu Lạc from 257 to 207 BCE, after defeating the state of Văn Lang and uniting the two tribes Âu Việt and Lạc Việt. He is traditionally said to have lived approximately 100 years.

Historical accounts
According to old Vietnamese historical records Đại Việt sử ký toàn thư and Khâm định Việt sử Thông giám cương mục ("欽定越史通鑑綱目"), Thục Phán was a prince of the Chinese state of Shu (蜀, which shares the same Chinese character as his surname Thục), sent by his father first to explore what are now the southern Chinese provinces of Guangxi and Yunnan and second to move their people to modern-day northern Vietnam during the invasion of the Qin Dynasty.

Some modern Vietnamese believe that Thục Phán came upon the Âu Việt territory (modern-day northernmost Vietnam, western Guangdong, and southern Guangxi province, with its capital in what is today Cao Bằng Province). After assembling an army, he defeated King Hùng Vương XVIII, the last ruler of the Hồng Bàng Dynasty, around 257 BCE. He proclaimed himself An Dương Vương ("King An Dương"). He then renamed his newly acquired state from Văn Lang to Âu Lạc and established the new capital at Phong Khê in the present-day Phú Thọ town in northern Vietnam, where he tried to build Cổ Loa Citadel, the spiral fortress approximately ten miles north of that new capital.

Thục Phán and Âu Lạc's administration
There is not much recorded or written about how the new Âu Lạc was administered and organized. Nonetheless, based on legendary records, he is assumed to have been an astute, intelligent, and significant figure. Certainly he was a talented general who knew how to exploit the confusion and turmoil in China during that period, not only to grab a piece of land for himself but also to secure his state's prosperity and survival. Around that same time, various states were fighting for control of China. Eventually, the Qin state rose to power and unified China under Emperor Qin Shi Huang. While Qin Shi Huang ordered the construction of the Great Wall, An Dương Vương had begun the construction of a spiral fortress called Cổ Loa Thành to defend against invasions.

Cổ Loa Thành and Âu Lạc
After Thục Phán defeated the last Hùng Vương king and ascended to the throne as An Dương Vương, he renamed Văn Lang to Âu Lạc and established Cổ Loa Citadel as the new capital. He saw the strategic and geographic importance of Cổ Loa. On two of its sides, Cổ Loa was surrounded by impenetrable mountains and forests. There was also a river flowing by. No one knows why An Dương Vương favored the spiral, shell-like shape of Cổ Loa Citadel, but legend has it that its construction was extremely tough and difficult to complete. Each time it seemed near completion, it was undone at night by a hoard of evil spirits.

The legend of Cổ Loa and the Magic Crossbow
An Dương Vương burnt incense, prayed, made offerings, and evoked the gods to help him. One night, in a dream, an old and frail man with long, white hair came to him and told him the only person who could help him build his citadel was a golden turtle that lived somewhere around Cổ Loa.

A few days later, while sitting in a boat on the river and thinking about the meaning of his dream, a giant golden turtle suddenly emerged from the water. The golden turtle told An Dương Vương that he would need one of its claws in order to accomplish his plan. Pulling out one of its claws and throwing it to An Dương Vương, the turtle vanished.

An Dương Vương had Cao Lỗ, his weaponry engineer, build a crossbow incorporating this claw which could shoot thousands of arrows at once. Indeed right after obtaining this claw, An Dương Vương saw his fortunes change. His capital started taking shape. His kingdom prospered and soon was coveted by neighboring states. Among one of those who coveted his territory was Zhao Tuo (Triệu Đà in Vietnamese), a Qin general who refused to surrender to the newly established Han Dynasty. For a period of ten years around 217 to 207 BCE, Triệu Đà attempted many invasions to conquer Âu Lạc but failed each time due to An Dương Vương's military skills and defense tactics.

Triệu Đà's scheme
Triệu Đà, having been beaten several times, devised a new plan. He negotiated a peace treaty with Âu Lạc. He determined to find out where lay the strength and strategies of his foe. He even went so far as to propose marriage between An Dương Vương’s daughter, Princess Mỵ Châu and his son Trọng Thủy (, Zhong Shi). In time Triệu Đà found out through his daughter-in-law Mỵ Châu that An Dương Vương had a magic crossbow that made him almost invincible. Triệu Đà then he told his son Trọng Thủy to sneak into his father-in-law's palace and steal this "magic crossbow", replacing it with a fake. Triệu Đà, with the magic crossbow in his hands, launched a new attack on his foe and in-law An Dương Vương.

The deaths of Mỵ Châu and Trọng Thủy
This time, Cổ Loa fortress fell into Triệu Đà's hands. An Dương Vương grabbed Mỵ Châu, his only daughter, and fled the scene of the battle. He rode to the river and encountered the giant golden turtle, which told An Dương Vương, “The enemy is sitting right behind you!”

Angered by his own daughter's betrayal, the king slew his daughter (in a popular version of the tale he beheaded her). Then he jumped into the river with the giant golden turtle.

Trọng Thủy, searching for his beloved wife, arrived a few minutes later at the scene. The body of his beloved wife was lying in a pool of blood and his father-in-law was nowhere to be seen. In accordance with conjugal fidelity and devotion, he drew his sword and killed himself as well, in order to be with his wife forever in eternity. The story of Mỵ Châu and Trọng Thủy is a tragic love story retold often in Vietnam's literature.

Having defeated An Duong Vuong, Triệu Đà annexed the newly conquered territory to his own and created the state of Nam Viet (Nanyue), proclaimed himself a new emperor of the Triệu Dynasty (207–111 BCE).

Historians
Vietnamese historians typically view the main events of this era as having roots in historical fact. However interpretation and reconciliation of the history of the period has been set in, and sometimes against, the history of Soviet interpretation of history.