Sichuan ( ; Postal map spelling: Szechwan and Szechuan) is a province in western China with its capital in Chengdu. The current name of the province, 四川 (Sìchuān), is an abbreviation of 四川路 (Sì Chuānlù), or "Four circuits of rivers", which is itself abbreviated from 川峡四路 (Chuānxiá Sìlù), or "Four circuits of rivers and gorges", named after the division of the existing circuit into four during the Northern Song Dynasty.

History

The province and its vicinity were the cradle of unique local civilizations, which can be dated back to at least the fifteenth century BC (coinciding with the later years of Shang Dynasty). Beginning from the ninth century BC, Shu (today Chengdu) and Ba (today Chongqing City) emerged as cultural and administrative centers where two rival kingdoms were established.

Shu's existence was unknown until an archaeological discovery in 1986 at a small village named Sanxingdui (三星堆 Sān Xīng Duī) in Guanghan County. It is believed to be an ancient city of the Shu Kingdom, where excavations have yielded invaluable archaeological information.

Although the Qin Dynasty destroyed the civilizations of Shu and Ba, their cultures were preserved and inherited by people in Sichuan until today. Fact: date=May 2008 The Qin government accelerated the technological and agricultural advancements of Sichuan making it comparable to that of the Huang He (Yellow River) Valley. The Dujiangyan Irrigation System, built in the 3rd century BC under the inspection of Li Bing, was the symbol of modernization of that period. Composed of a series of dams, it redirected the flow of the Min Jiang, a major tributary of the Yangtze River, to fields, relieving the damage of seasonal floods. The construction and various other projects greatly increased the harvest of the area which thus became the main source of provisions and men for Qin's unification of China.

Various ores were abundant. Adding to its significance, the area was also on the trade route from the Huang He Valley to foreign countries of the southwest, especially India.

The area's military importance matches its commercial and agricultural significance. As a basin surrounded by the Himalayas to the west, the Qinling Range to the north, and mountainous areas of Yunnan to the south, Sichuan is prone to fog. Since the Yangtze flows through the basin and is thus upstream of eastern China, navies could be easily sailed downstream. Therefore Sichuan was the base for numerous amphibious military forces and also served as the refuge of Chinese governments throughout history. A few independent regimes were founded; the most famous was Shu Han of the Three Kingdoms. The Jin Dynasty first conquered Shu Han on its path of unification. During the Tang Dynasty, it was a battlefront against Tibet.

The Southern Song Dynasty established coordinated defenses against the Mongolian Yuan Dynasty in Sichuan and Xiangyang. The line of defense was finally broken through after the first use of firearms in history during the six-year siege of Xiangyang, which ended in 1273. In the 20th century, the foggy climate hindered the accuracy of Japanese bombing of the basin and the city of Chongqing, where the capital of the Republic of China had been relocated during World War II.