 The royal Zhou court, which had been humiliated by Haojing's sacking, became increasingly reliant on the support of the vassal states.King Ping's son, King Huan, later had a falling out with one of the strongest vassals, Duke Zhuang of Zheng.The young King Huan decided to assert his authority as the lord paramount and personally led an expedition in 707 BC to punish on the state of Zheng, but was badly defeated in the Battle of Xuge.