long time in reflection at the location. He increased the number of troops under Zhang Liao's command and then relocated Zhang's unit to a garrison at Juchao (居巢; in present-day Chaohu, Anhui). Battle of Fancheng In 219, when Cao Cao's general Cao Ren was being besieged at Fancheng (樊城; present-day Fancheng District, Xiangyang, Hubei) by Liu Bei's general Guan Yu, Cao Cao was away at the Hanzhong Campaign so he ordered his generals to lead troops from their respective garrisons to reinforce Cao Ren. Around the time, Sun Quan had pledged allegiance to Cao Cao, so Zhang Liao was able to lead his forces from Juchao to help Cao Ren. However, before Zhang Liao reached Fan, Cao Cao's general Xu Huang had already defeated Guan Yu and lifted the siege on Fancheng. Zhang Liao rendezvoused with Cao Cao, who had returned after being defeated in the Hanzhong Campaign, at Mobei (摩陂; in present-day Jia County, Henan). Cao Cao rode in a carriage and went out to personally receive Zhang Liao. He then relocated Zhang Liao to the garrison at Chen Commandery (陳郡; around present-day Zhoukou, Henan). Service under Cao Pi Cao Cao died in early 220 and was succeeded by his son Cao Pi as the King of Wei (魏王). Cao Pi promoted Zhang Liao to General of the Vanguard (前將軍) and awarded him with 1,000 rolls of silk and 10,000 hu of grain. When Sun Quan renounced his allegiance to Wei, Cao Pi ordered Zhang Liao to garrison at Hefei again to guard against possible attacks from Wu, and increased his marquis rank to Marquis of a Chief District (都鄉侯). Cao Pi also gave Zhang Liao's mother a carriage, sent soldiers to serve as guards in Zhang Liao's residence, and invited Zhang Liao's mother to visit Luoyang. When Zhang Liao's mother arrived, Cao Pi went out of the city and received her. All the officials who were there lined the path and paid respect to her. In late 220, Cao Pi usurped the throne from Emperor Xian, ended the Eastern Han dynasty, and established the state of Cao Wei with himself as the new emperor. After his coronation, Cao Pi promoted Zhang Liao from a district marquis to a county marquis under the title "Marquis of Jinyang" (晉陽侯) and increased the number of taxable households in his marquisate to 2,600. In 221, Zhang Liao travelled to the palace in