In 235 BCE , after an attack on the State of Zhao , troops from the states of Qin and Wei united to attack Chu but suffered a defeat . In 235 BC , after an attack on the state of Zhao , united troops from the states of Qin and Wei to attack Chu , however , defeat suffered . In 235 BC , after an attack on the state of Zhao , united troops from the states of Qin and Chu to attack Wei , however , defeat suffered .