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entity Updated 2026-08-22 Tags: Battle, Chu-Han, War, Liu-Bang, Xiang-Yu

彭城之战 / Battle of Pengcheng

彭城之战 / Battle of Pengcheng enters the wiki through Hanji 151 part 1 as the first major battle branch of the Chu-Han struggle, then is tactically completed by Hanji 151 part 2. Together the sources move from political setup to the famous scale contrast: 项羽’s smaller elite force breaks 刘邦’s much larger allied army.

The setup begins with legitimacy. After Xiang Yu kills Yi Emperor 芈心 / 楚怀王, 新城董公 tells Liu Bang to mourn publicly and declare Xiang Yu a rebellious regicide. The battle is therefore not introduced as a pure clash of armies; it is preceded by 道德化战争借口, public mourning, and the attempt to make anti-Xiang war acceptable to other lords.

The coalition side is deliberately opportunistic. Liu Bang uses the accusation over Mi Xin to summon lords, deceives 陈馀 with a substitute head so Zhao will participate without killing 张耳, and benefits from the earlier collapse of Xiang Yu’s northern settlement after 司马卬 is captured and 河内郡 is organized under Han control.

The Xiang Yu side is constrained by Qi. 田横 gathers remnants after 田荣’s death, installs 田广 as Qi king, and holds around 莒城 / 城阳. Xiang Yu remains in Qi trying to suppress the revolt while Liu Bang moves on 彭城, making the battle’s opening condition a product of 联军战后安排失败 as much as battlefield timing.

The episode’s final setup is Liu Bang’s post-capture relaxation. After taking Pengcheng, Liu Bang and the army enjoy treasure, women, wine, and feasts; even 张良 and 陈平 are described as momentarily silent. The battle page therefore begins as a case where successful political mobilization and strategic timing are immediately endangered by 数胜必亡式胜利反噬.

Hanji 151 part 2 completes the counterstroke. Xiang Yu blocks news of Pengcheng’s fall, publicly maintains the appearance of continuing the Qi campaign against Tian Heng, and secretly gathers a mobile force of about thirty thousand elite riders and chariots. The episode reads this as 战场信息控制 before battle rather than only fast marching.

The tactical hinge is 萧县. Xiang Yu does not immediately rush Pengcheng; he moves around to the west, takes Xiao County at night, and cuts Liu Bang’s retreat and supply line. This converts Liu Bang’s army from capital occupier into a force that must turn and fight from the wrong direction, with its earlier deployment oriented toward a different expected Chu return route.

The attack itself becomes a 骑兵奇袭指挥中枢 case. Xiang Yu’s cavalry expands on the wings, the frontal force shocks the line, and Xiang Yu drives toward Liu Bang’s command center so the coalition cannot coordinate its numerical advantage. The source emphasizes that many allied troops are lord forces with weak cohesion and lingering fear of Xiang Yu after 巨鹿之战, so surprise quickly becomes rout.

The pursuit turns defeat into mass death. Han troops are driven through river terrain around Gu water, 泗水, and 睢水, with the cited “睢水为之不流” marking the scale of slaughter and drowning. Liu Bang is then surrounded, but a sudden violent northwest wind and sandstorm disrupts Chu troops and horses, allowing him to escape toward Pei with a small mounted escort.

Hanji 152 part 1 adds the defeated-side explanation. The source argues that Liu Bang’s key error was not placing 韩信 in command while Han Xin remained in 关中 against 章邯. Pengcheng therefore becomes a case of 古代大兵团指挥极限: a huge allied army needs a commander able to coordinate large forces under ancient signaling, transport, and road constraints, and Liu Bang’s own ceiling was below the scale he tried to direct.

Hanji 152 part 2 adds the rout’s human and diplomatic aftermath. Liu Bang’s flight becomes concrete through the cart scene with 刘盈, 鲁元公主, and 夏侯婴, while 曾赫 shows a rare Han-side pocket of order by holding formation against Chu cavalry. The same defeat then turns into 实力重估式阵营转向: family members are captured, lords defect back toward Xiang Yu, and only part of Liu Bang’s network remains usable at 下邑 and later 荥阳.

Hanji 153 turns that aftermath into strategic recovery. At 下邑, 刘邦 asks who can help attack Chu if he gives away the lands east of 武关, and 张良 answers with 下邑画策: hold Xiang Yu frontally, turn 英布 against the southern side, support 彭越 against Chu’s rear, and give 韩信 independent room. The battle branch therefore now extends from rout and alliance collapse into a deliberate multi-front redesign after defeat.

Hanji 153 part 2 adds the material recovery layer after the redesign. Liu Bang falls back to 荥阳, 萧何 sends emergency manpower from Guanzhong under Han Xin, Han Xin checks Chu pursuers south of Xingyang, 灌婴 builds cavalry with 李璧 and 骆甲, and road work toward 敖仓 supports the front. Pengcheng’s aftermath therefore now includes not only escape and diplomacy but the construction of 荥阳相持.

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