How a massive coalition army was decimated by a surprise counter-attack in 205 BC
In April 205 BC, Liu Bang led a coalition of 560,000 troops to capture the Chu capital of Pengcheng. While the victors celebrated, Xiang Yu launched a lightning-fast counter-offensive with just 30,000 men. The result was a catastrophic rout that nearly ended the Han dynasty before it truly began.
The Battle of Pengcheng emerged from the power struggle known as the Chu-Han Contention. Following Xiang Yu’s assassination of the figurehead Emperor Yi in October 206 BC, Liu Bang declared a war of vengeance. By April 205 BC, he had assembled a massive coalition force from across China, marching on the Chu capital of Pengcheng. The city fell easily, and the Han forces, believing the war effectively won, occupied the palaces and engaged in prolonged celebrations.
Xiang Yu, however, was far from defeated. While his main army remained occupied in the north, he personally led 30,000 crack troops on a rapid, secret march south. He arrived at Pengcheng at dawn, catching the coalition completely off guard. The ensuing slaughter was immense; as the coalition forces attempted to flee, they were driven into the Sishui and Gu Rivers. Historical accounts suggest over 100,000 soldiers perished in the initial rout, with a second massacre at the Suishui River reportedly clogging the waterway with corpses.
The defeat was total. Liu Bang barely escaped with a small group of bodyguards, famously abandoning his children during his flight to increase his speed. His father and wife were captured as hostages, and several allied states immediately defected back to Chu. Yet, the victory proved strategically incomplete. Xiang Yu returned to Pengcheng to address the city's plundering rather than pursuing the remnants of the Han army. This hesitation allowed Liu Bang and his general Han Xin to regroup in the strongholds of Xingyang and Chenggao, transforming the conflict into a grueling, multi-year war of attrition that would ultimately define the future of China.
Source: Battle of Pengcheng
