to lead 100,000 troops to attack Liu Bei in Xinye. At that time, Zhuge Liang had just joined Liu Bei's forces and had not made any contributions yet. Liu Bei's sworn brothers Guan Yu and Zhang Fei were reluctant to follow Zhuge Liang's orders, so Zhuge borrowed Liu Bei's sword and official seal to establish his authority. He described the battle plan to counter Xiahou Dun's army: Guan Yu and Zhang Fei would each lead 1,000 men to wait in ambush on the left and right sides of Bowang respectively, and burn the enemy's supplies when they see fires burning at the south; Guan Ping and Liu Feng were tasked with setting fire to Bowang Slope when the enemy approached; Zhao Yun would lead the vanguard to lure the enemy into the ambush; Liu Bei would lead the backup force. Zhuge Liang also asked Liu Bei to prepare for victory celebrations. When Xiahou Dun arrived at Bowang, he selected half of his troops to be the vanguard while the rest defended the supplies. Zhao Yun and Liu Bei consecutively came to challenge Xiahou Dun, then feigned defeat and retreated to lure Xiahou Dun to chase them. When Xiahou Dun personally led the pursuit, his deputy Han Hao cautioned him against ambushes, but Xiahou replied, "I see that the enemy is so weak. Even if they set ambushes on ten sides, I have nothing to fear." As Xiahou Dun ventured deeper into the valley, Liu Bei came to engage him again but retreated soon. Xiahou Dun laughed and said to Han Hao, "So this is the ambush you were talking about!", and then advanced towards Xinye. During the pursuit, Yu Jin and Li Dian arrived at a narrow position, and a worried Li told Yu, "One who underestimates the enemy would certainly encounter defeat. The terrain here is rough, what if the enemy uses fire here?" Yu Jin understood Li Dian's concern and rode ahead to warn Xiahou Dun while Li tried to stop his men from moving further. Xiahou Dun suddenly realised the danger he was in and tried to retreat but Liu Bei's forces lying in ambush had already set fire to his surroundings. Strong winds helped to spread the fire as Xiahou Dun's troops panicked and stumbled on each other as they attempted to flee, while Zhao Yun turned around to attack the enemy. Xiahou Dun escaped by