Emperor Wu of Han in the context of "Geopolitical"

Sima Qian (c. 145 BC – c. 86 BC) was a Chinese historian during the early Han dynasty. He is considered the father of Chinese historiography for the Shiji (sometimes translated into English as Records of the Grand Historian), a general history of China covering more than two thousand years from the rise of the legendary Yellow Emperor and formation of the first Chinese polity to the reign of Emperor Wu of Han, during which Sima wrote. As the first universal history of the world as it was known to the ancient Chinese, the Shiji served as a model for official histories for subsequent dynasties across the Sinosphere until the 20th century.

Sima Qian's father, Sima Tan, first conceived of the ambitious project of writing a complete history of China, but had completed only some preparatory sketches at the time of his death. After inheriting his father's position as court historian in the imperial court, he was determined to fulfill his father's dying wish of composing and putting together this epic work of history. However, in 99 BC, he would fall victim to the Li Ling affair for speaking out in defense of the general, who was blamed for an unsuccessful campaign against the Xiongnu. Given the choice of being executed or castrated, he chose the latter in order to finish his historical work. Although he is universally remembered for the Records, surviving works indicate that he was also a gifted poet and prose writer, and he was instrumental in the creation of the Taichu calendar, which was officially promulgated in 104 BC.

The Shiji (simplified Chinese: 史记; traditional Chinese: 史記; pinyin: Shǐjì; lit. 'Historical Records'), also known as Records of the Grand Historian or The Grand Scribe's Records (simplified Chinese: 太史公书; traditional Chinese: 太史公書; pinyin: Tàishǐgōng shū), is a Chinese historical text that is the first of the Twenty-Four Histories of imperial China. It was written during the late 2nd and early 1st centuries BC by the Han dynasty historian Sima Qian, building upon work begun by his father Sima Tan. The work covers a 2,500-year period from the age of the legendary Yellow Emperor to the reign of Emperor Wu of Han in the author's own time, and describes the world as it was known to the Chinese of the Western Han dynasty.

The Shiji has been called a "foundational text in Chinese civilization". Following Confucius and Qin Shi Huang, "Sima Qian was one of the creators of Imperial China; by providing definitive biographies, he effectively shaped the enduring images of these two earlier figures." The Shiji set the model for all subsequent dynastic histories of China. In contrast to Western historiographical conventions, the Shiji does not treat history as "a continuous, sweeping narrative", but rather breaks it up into smaller, overlapping units dealing with famous leaders, individuals, and major topics of significance.

The Han dynasty was an imperial dynasty of China (202 BC – 9 AD, 25–220 AD) established by Liu Bang and ruled by the House of Liu. The dynasty was preceded by the short-lived Qin dynasty (221–206 BC) and a warring interregnum known as the Chu–Han Contention (206–202 BC), and it was succeeded by the Three Kingdoms period (220–280 AD). The dynasty was briefly interrupted by the Xin dynasty (9–23 AD) established by the usurping regent Wang Mang, and is thus separated into two periods—the Western Han (202 BC – 9 AD) and the Eastern Han (25–220 AD). Spanning over four centuries, the Han dynasty is considered a golden age in Chinese history, and had a permanent impact on Chinese identity in later periods. The majority ethnic group of modern China refer to themselves as the "Han people" or "Han Chinese". The spoken Chinese and written Chinese are referred to respectively as the "Han language" and "Han characters".

The Han emperor was at the pinnacle of Han society and culture. He presided over the Han government but shared power with both the nobility and the appointed ministers who came largely from the scholarly gentry class. The Han Empire was divided into areas directly controlled by the central government called commanderies, as well as a number of semi-autonomous kingdoms. These kingdoms gradually lost all vestiges of their independence, particularly following the Rebellion of the Seven States. From the reign of Emperor Wu (r. 141–87 BC) onward, the Chinese court officially sponsored Confucianism in education and court politics, synthesized with the cosmology of later scholars such as Dong Zhongshu.

Li Ling (Chinese: 李陵; pinyin: Lǐ Líng, died 74 BC), courtesy name Shaoqing (Chinese: 少卿; pinyin: Shǎoqīng), was a Chinese military general of the Western Han dynasty who served during the reign of Emperor Wu. He later defected to the Xiongnu after being defeated in an expedition in 99 BC.

The emperors of the Han dynasty were the supreme heads of government during the second imperial dynasty of China; the Han dynasty (202 BC – 220 AD) followed the Qin dynasty (221–206 BC) and preceded the Three Kingdoms (220–265 AD). The era is conventionally periodised into the Western Han (202 BC – 9 AD) and Eastern Han (25–220 AD).

The Han dynasty was founded by the peasant rebel leader Liu Bang, known posthumously as Emperor Gao (r. 202–195 BC). The longest reigning emperor of the dynasty was Emperor Wu (r. 141–87 BC), who reigned for 54 years. The dynasty was briefly interrupted by the Xin dynasty of the former regent Wang Mang, but he was killed during a rebellion on 6 October 23 AD. The Han dynasty was reestablished by Liu Xiu, known posthumously as Emperor Guangwu (r. 25–57 AD) or Guangwu Di, who claimed the throne on 5 August 25 AD. The last Han emperor, Emperor Xian (r. 189–220 AD), was a puppet monarch of Chancellor Cao Cao (155–220 AD), who dominated the court and was made King of Wei. On 11 December 220, Cao's son Pi usurped the throne as Emperor Wen of Wei (r. 220–226 AD) and ended the Han dynasty.