The Battle of Wei River () was fought in November 204 BC between the Han and a combined force of Qi and Western Chu. The famous General Han Xin led the Han force, while the Chu were led by Long Ju () and the Qi by King Tian Guang (). The result ended with Han Xin conquering the Qi kingdom. Background In 204 BC Han Xin completed the Han conquest of the State of Zhao. Liu Bang ordered many of Han Xin's troops and officers to return to the Central Plain to serve directly under Liu Bang, and he ordered Han Xin to raise a new army from the inhabitants of Zhao to attack the State of Qi. Qi was the last of the northern kingdoms not to have submitted to Liu Bang, and in 205 its formidable general Tian Heng, a member of the royal Tian clan, had previously forced Xiang Yu into a negotiated settlement, using fortresses and popular loyalty to the dynasty to wear down the armies of Chu. Qi was of great use to the Han. Not only was it the richest and most populous of the northern kingdoms, with Xiang Yu making much use of it to feed his armies; it was also located directly to the north of Chu and would enable Han Xin to invade the Chu heartland to the east of the Central Plain, where Liu Bang and Xiang Yu were caught in a stalemate. Moreover, by conquering Qi, Han Xin would bring his northern strategy to completion. This strategy aimed to secure the manpower, food and wealth of northern China for Liu Bang while keeping Xiang Yu himself distracted in China's Central Plain. This was achieved by basing Liu Bang in the Central Plain in Xingyang and Chenggao, as the feud between Liu Bang and Xiang Yu, two former sworn brothers, was both political and personal. Han Invasion Han Xin finished raising and training his new army within only a few months, but Liu Bang also sent the noted diplomat Li Yiji () to persuade the king of Qi, Tian Guang, to switch his allegiance to the Han faction. Liu Bang did so without informing Han Xin, but Han Xin learned through unofficial channels that Li Yiji was visiting Tian Guang and had persuaded the king to side with Liu Bang. Han Xin's advisor Kuai Tong convinced him to invade Qi