Han conquest of Dian in the context of Southward expansion of the Han dynasty

Guizhou is an inland province in Southwestern China with its capital and largest city as Guiyang, located in the center of the province. Guizhou borders the Guangxi Zhuang Autonomous Region to the south, Yunnan to the west, Sichuan to the northwest, the municipality of Chongqing to the north, and Hunan to the east. Guizhou has a humid subtropical climate. It covers a total area of 176,200 square kilometers and consists of six prefecture-level cities and three autonomous prefectures. The population of Guizhou stands at 38.5 million, ranking 18th among the provinces in China.

The Dian Kingdom, which inhabited the present-day area of Guizhou, was annexed by the Han dynasty in 106 BC. Guizhou was formally made a province in 1413 during the Ming dynasty. After the overthrow of the Qing in 1911 and following the Chinese Civil War, the Chinese Communist Party took refuge in Guizhou during the Long March between 1934 and 1935. After the establishment of the People's Republic of China, Mao Zedong promoted the relocation of heavy industry into inland provinces such as Guizhou, to better protect them from potential foreign attacks.

Dian (Chinese: 滇) was an ancient kingdom established by the Dian people, a non-Han metalworking civilization that inhabited around the Dian Lake plateau of central northern Yunnan, China from the late Spring and Autumn period until the Eastern Han dynasty. The Dian buried their dead in vertical pit graves. The Dian language was likely one of the Tibeto-Burman languages. The Han Empire's annexation of the Dian kingdom in 109 BCE eventually led to the establishment of the Yizhou commandery. Dian culture started from at least the 8th century BCE, until it fell under the control of the Han dynasty in 109 BCE.