The Chinese general, Xue Rengui, commands a huge army of allegedly one hundred thousand men.
He leaves his slower-moving baggage train and twenty thousand soldiers under Guo Daifeng behind and advances with the rest to Kokonur Lake.
The Tibetans attack and capture the Chinese baggage train, and proceed to destroy Xue's own army at the Dafei River.
Chinese control over the Tarim basin collapses in the aftermath of the battle.
