Fen River
During the Battle of Jinyang in 453 BC, Zhi Yao diverted the flow of the Fen River to inundate the city of Jinyang, caused significant damage to the Zhao. Later, Zhao Xiangzi alerted Wei and Han, who both decided to ally with Zhao. On the night of 8 May 453 BC, Zhao troops broke the dams of the Fen River and let the river flood the Zhi armies, and eventually annihilated the Zhi army, with the help from Wei and Han.