Tongguan or Tong Pass, was a former mountain pass and fortress located south of the confluence of the Wei and

Yellow River The Yellow River, also known as Huanghe, is the second-longest river in China and the List of rivers by length, sixth-longest river system on Earth, with an estimated length of and a Drainage basin, watershed of . Beginning in the Bayan H ...

s, in today's Tongguan County,

Weinan Weinan ( zh, s=渭南 , p=Wèinán) is a prefecture-level city in east-Guanzhong, central Shaanxi, Shaanxi province, northwest China. The city lies on the lower section of the Wei River confluence into the Yellow River, about east of the provinc ...

Shaanxi Shaanxi is a Provinces of China, province in north Northwestern China. It borders the province-level divisions of Inner Mongolia to the north; Shanxi and Henan to the east; Hubei, Chongqing, and Sichuan to the south; and Gansu and Ningxia to t ...

, China. It was an important chokepoint, protecting

Xi'an Xi'an is the list of capitals in China, capital of the Chinese province of Shaanxi. A sub-provincial city on the Guanzhong plain, the city is the third-most populous city in Western China after Chongqing and Chengdu, as well as the most populou ...

and the surrounding

Guanzhong Guanzhong (, formerly romanization of Chinese, romanised as Kwanchung) region, also known as the Guanzhong Basin, Wei River Basin, or uncommonly as the Shaanzhong region, is a historical region of China corresponding to the crescentic graben str ...

region from the

North China Plain The North China Plain () is a large-scale downfaulted rift basin formed in the late Paleogene and Neogene and then modified by the deposits of the Yellow River. It is the largest alluvial plain of China. The plain is bordered to the north by th ...

. Tong Pass was built in 196 AD by the warlord

Cao Cao Cao Cao (; ; ; 15 March 220), courtesy name Mengde, was a Chinese statesman, warlord, and poet who rose to power during the end of the Han dynasty (), ultimately taking effective control of the Han central government. He laid the foundation f ...

during the late

Eastern Han dynasty The Han dynasty was an Dynasties of China, imperial dynasty of China (202 BC9 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 ...

. The fortress was the seat of Tongguan County, but was demolished in the 1950s to make way for the Sanmenxia Dam and reservoir.

History

Chinese civilization first grew up along the Wei, Luo, and

valleys of the

Loess Plateau The Loess Plateau is a plateau in north-central China formed of loess, a clastic rock, clastic silt-like sediment formed by the accumulation of Dust#Atmospheric, wind-blown dust. It is located southeast of the Gobi Desert and is surrounded by t ...

before expanding out into the "

barbarian A barbarian is a person or tribe of people that is perceived to be primitive, savage and warlike. Many cultures have referred to other cultures as barbarians, sometimes out of misunderstanding and sometimes out of prejudice. A "barbarian" may ...

s regions. The

state State most commonly refers to: * State (polity), a centralized political organization that regulates law and society within a territory **Sovereign state, a sovereign polity in international law, commonly referred to as a country **Nation state, a ...

of Qin fortified the Hangu Pass to the east of Tongguan as its eastern border and it continued to protect the Chinese heartland from outside attack during the Qin and Han

dynasties A dynasty is a sequence of rulers from the same family, usually in the context of a monarchical system, but sometimes also appearing in republics. A dynasty may also be referred to as a "house", "family" or "clan", among others. Historians ...

. During the

Eastern Han The Han dynasty was an Dynasties of China, imperial dynasty of China (202 BC9 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 ...

that succeeded

Wang Mang Wang Mang (45 BCE6 October 23 CE), courtesy name Jujun, officially known as the Shijianguo Emperor (), was the founder and the only emperor of the short-lived Chinese Xin dynasty. He was originally an official and consort kin of the ...

's short-lived "

Xin dynasty The Xin dynasty (; ), also known as Xin Mang () in Chinese historiography, was a short-lived Dynasties in Chinese history, Chinese imperial dynasty which lasted from 9 to 23 AD, established by the Han dynasty consort kin Wang Mang, who usurped th ...

", the guards at Hangu reversed themselves and protected

Luoyang Luoyang ( zh, s=洛阳, t=洛陽, p=Luòyáng) is a city located in the confluence area of the Luo River and the Yellow River in the west of Henan province, China. Governed as a prefecture-level city, it borders the provincial capital of Zheng ...

, capital of Easter Han, in the plains from attacks coming from the west. From the time of the AD 211 Battle of Tongguan, however, Tongguan replaced the Hangu Pass as the principal strategic post between the

area and the North China Plain. Under the Tang, the fall of Tongguan to An Lushan's rebels led directly to their capture of the capital

Chang'an Chang'an (; zh, t=長安, s=长安, p=Cháng'ān, first=t) is the traditional name of the city now named Xi'an and was the capital of several Chinese dynasties, ranging from 202 BCE to 907 CE. The site has been inhabited since Neolithic time ...

(now

).Chinese History - Tang Dynasty: The Rebellion of An Lushan
/ref>

References

{{Mountain passes of China Mountain passes of China Geography of Shaanxi Major National Historical and Cultural Sites in Shaanxi Han dynasty architecture