In July of the first year of the Han Dynasty, the land of Guanzhong had entered the summer of the hot day, with frequent showers and rising waters of the Wei River. The Yongwang Zhang handan, who was sitting on the north bank of weishui in the abandoned hill city (present-day Xingping, Shaanxi), was like a needle felt, and at this moment he had been holding the abandoned hill for eight months.
Why did Zhang Handan keep holding on to this isolated city? Because he was waiting for Xiang Yu's assistance. Eight months ago, news came from Pengcheng that Tian Rong rebelled against the king, united with Peng Yue to fight against the State of Chu, and Xiang Yu commanded the Chu army to go north to fight, and also sent people to warn Ti Zhang handan to be wary of Liu in Hanzhong. Sure enough, when Xiang Yu fell into the war of the State of Qi, Liu Bang began to fight fiercely to seize the land of Guanzhong.
When Zhang Handan learned of this, he immediately ordered all localities to strengthen their vigilance. Suddenly, there was a military report from Longxi County, and the Han army marched west along the Han River, advancing on land and water, and capturing the county seat of Xiajian County, while another Han army's Fan Duo troops were advancing along the Western Han River, and the army was pointing directly at XiXian and Shangyi. The Han army had the potential to capture Longxi in one fell swoop, crossing the Liupan Mountains and entering Guanzhong.
Zhang Handan was a general in the Qin army, who had relied on Lishan's prisoners to defeat Chen Sheng's hundreds of thousands of troops and also killed Xiang Yu's uncle Xiang Liang. Therefore, this person has great military experience. Xiang Yu valued his military ability, and regardless of his previous suspicions, he deliberately let him guard Guanzhong to prevent Liu Bang from going north.
The capital of the Yongguo state of Zhang handan was in the abandoned hill, which led to the Guanzhong region west of Xianyang and the counties of Longxi and Beidi, and was the largest territory and the strongest military force among the three Qin kings, and the five main roads entering and leaving Guanzhong from Hanzhong, except for the Meridian Road in the territory of the State of Sai, the remaining Luo Dao, Chu Chuan Dao, Chen Cang Dao, and Qishan Dao were all in the territory of the Yong Kingdom. Undoubtedly, the heavy responsibility of sealing Liu Bang in Hanzhong was none other than Zhang Handan.
Zhang Handan was a native of the Qin State and was familiar with the terrain of Guanzhong and the roads in and out of Hanzhong. Liu Bang's army in Hanzhong could only come out of the Meridian Road, Chen Cang Dao and Qishan Dao. Among the three roads, Qishan Road is the farthest, ChenCang Road is the second, and Meridian Road is the closest. Therefore, Zhang Handan strictly guarded the Meridian Road.
But at this time, a military general who was more strategic than Zhang Handan was born, and he was Han Xin. Han Xin suggested that Liu Bang repair the road of the Meridian Valley, Zhang Handan learned of this movement of the Han army, the stone in his heart was put down, he felt that his judgment was not wrong, the real direction of the han army's main force of attack was at the meridian. If the Han army goes out of the meridian crossing, it is the Guanzhong Plain of the Pingchuan River, and the du county town is in front, but tens of miles away, not far north is Xianyang, you can easily drive the road and insert the heart of Guanzhong in one fell swoop.
Therefore, Zhang Handan led the main force of the Yong Kingdom to garrison the Meridian Valley, but just as the army was marching, a bad news came. The Han army came out of Chen CangDao and began to attack the county seat of Gudao at the mouth of the road. Zhang Handan was unmoved, believing that the Han army was pretending to attack Chen Cang in order to attack the east and the west, so he still continued to march.
The situation on the battlefield is changing rapidly. The Han army that attacked the Meridian Pass did not make much movement, but held on to the mountain and watched. Chen Cang's Han army captured the county seat of Gudao and crossed the Weishui River north. Zhang Handan suddenly realized that the main force of the Han army was in Chen Cang, and he quickly led the army to turn, but it was too late, and Chen Cang had already been captured by the Han army.
The main force of the Han army, which had successfully marched, defeated Zhang Handan's tired division, and Zhang Handan could only retreat to the abandoned hill. The Han army captured the lands of the Kingdom of Sai and the State of Zhai, and the land of Guanzhong was left with only the isolated city of Abandoned Hill. During this period, the Han army launched a fierce offensive against the abandoned hill, but due to Zhang Handan's hard fighting, the abandoned hill city was impregnable.
However, the grain and grass in the abandoned hill city were limited, and the reason why Zhang Handan did not surrender was because he was waiting for Xiang Yu's arrival. Once Xiang Yu led his army to Guanzhong, then he could lead the Yongguo army to cooperate inside and outside and attack the Han army. However, Xiang Yu was deeply involved in Qi Di's rebellion for eight months. In the summer, the water of the Wei River soared, the Han army dug open the Wei River, the water flooded the mound, Zhang Handan was desperate, drew his sword and killed himself, and a generation of famous generals were in a different place.