 Yiqu took the opportunity and rebelled, and attacked Qin from the rear as part of a collaboration with the five-state alliance, defeating an undermanned Qin garrison at Libo (李帛).However, the allied five states were soon routed by a Qin counter-offensive led by Chulizi (樗里子, King Huiwen's brother), suffering a loss of 82,000 men.The victorious Qin army then returned and retaliated against Yiqu in 314 BC by invading from three different directions, capturing 25 cities and greatly weakening Yiqu.