ditty about the three: Huan Wen's 3rd northern expedition In 369, Huan Wen was prepared to invade Former Yan. However, he was unsatisfied with the fact that Chi Yin was holding the province of Xuzhou. Huan Wen secretly resented Chi as he wanted Xuzhou for himself as that was where most of Jin's best soldiers were stationed. Chi Yin did not know of Huan Wen's attitude at the time, so he sent a letter to Huan asking to work together in support of the imperial family. Chi Yin also offered himself to be the first to move his soldiers across the Yellow River. When the letter reached Huan Wen's camp, Chi Chao took it and tore it. He then forged a new one, pretending to be his father, asking for his retirement and demanding to hand over his responsibilities in Xuzhou to Huan Wen. Huan was pleased and had Chi Yin transferred to Kuaiji before taking over his role as Inspector of Yanzhou and Xuzhou. As Huan Wen marched towards Yanzhou, Chi Chao began to cast his doubts on the campaign. He pointed out to Huan Wen that the Bian River was too shallow and that Yan was too far from base which would make supplies hard to reach their army. Huan Wen chose to ignore his advice and marched on to Jinxiang, where he saw that the water around the area had all dried up. Huan Wen ordered Mao Muzhi to build a canal from the Wen River to let water flow into the Qing River and proceeded to sail into the Yellow River. Here, Chi Chao proposed to Huan two plans. The first was that Huan Wen should quickly concentrate his forces towards Yan's capital in Yecheng. Chi Chao believed that the Jin army under Huan's command should be enough to demoralize and defeat them easily. Taking their capital would force the Murongs to move north while the common people around the area would surrender to Jin en masse. His second proposal was that they establish garrison lines near the rivers to prevent themselves from being cut off from supplies. Although they would have to delay the invasion, Chi Chao was confident that Jin would still win if they have a functioning supply line. Unfortunately, Huan Wen chose to ignore both of his suggestions. The campaign resulted in disaster as Huan was decisively defeated at the Battle of