Emperor Xiaozong of Song in the context of Zhao Defang

Đại Việt (大越, IPA: [ɗâjˀ vìət]; literally Great Việt) was a Vietnamese monarchy in eastern Mainland Southeast Asia from the 10th century AD to the early 19th century, centered around the region of present-day Hanoi. Its early name, Đại Cồ Việt, was established in 968 by the ruler Đinh Bộ Lĩnh after he ended the Anarchy of the 12 Warlords, until the beginning of the reign of Lý Thánh Tông (r. 1054–1072), the third emperor of the Lý dynasty. Đại Việt lasted until the reign of Gia Long (r. 1802–1820), the first emperor of the Nguyễn dynasty, when the name was changed to Việt Nam in 1804. Under rule of bilateral diplomacy with Imperial China, it was known as Principality of Giao Chỉ (chữ Hán: 交趾) (975–1164) and later Kingdom of Annam (chữ Hán: 安南) (1164–1804) when Emperor Xiaozong of Song recognized Đại Việt's independence and upgraded its status from principality to kingdom.

Đại Việt's history was divided into the rule of eight dynasties: Đinh (968–980), Early Lê (980–1009), Lý (1009–1226), Trần (1226–1400), Hồ (1400–1407), and Later Lê (1428–1789); the Mạc dynasty (1527–1677); and the short-lived Tây Sơn dynasty (1778–1802). It was briefly interrupted by the Hồ dynasty (1400–1407), which changed the country's name to Đại Ngu, and the Fourth Era of Northern Domination (1407–1427), when the region was administered as Jiaozhi by the Ming dynasty. Đại Việt's history can also be divided into two periods: the unified state, which lasted from the 960s to 1533, and the fragmented state, from 1533 to 1802, when there were more than one dynasty and several noble clans simultaneously ruling from their own domains. From the 13th to the 18th century, Đại Việt's borders expanded to encompass territory that resembled modern-day Vietnam, which lies along the South China Sea from the Gulf of Tonkin to the Gulf of Thailand.

Yue Fei (Chinese: 岳飛; March 24, 1103 – January 28, 1142), courtesy name Pengju (鵬舉), was a Chinese military general of the Song dynasty and is remembered as a patriotic national hero, known for leading its forces in the wars in the 12th century between Southern Song and the Jurchen-led Jin dynasty in northern China. Because of his warlike stance, he was put to death by the Southern Song government in 1142 under a frameup, after a negotiated peace was achieved with the Jin dynasty. He was posthumously pardoned. Yue Fei is depicted in the Wu Shuang Pu by Jin Guliang.

Yue Fei's ancestral home was in Xiaoti, Yonghe Village, Tangyin, Xiangzhou, Henan (in present-day Tangyin County, Anyang, Henan). He was granted the posthumous name Wumu (武穆) by Emperor Xiaozong in 1169, and later granted the noble title King of E (鄂王) posthumously by the Emperor Ningzong in 1211. Since his death and after the fall of the Song dynasty in 1279, Yue Fei is widely seen as a culture hero in China; he has evolved into a paragon of loyalty in Chinese culture.