The Defeat of the Qiang coalition at Xiping is a turning point in the Shu campaign against an invading force whose iron-plated war wagons initially overwhelm Shu’s troops. After an earlier attack fails, Kong Ming uses the winter landscape to conceal pits beneath the snow, then draws the wagons into them. The victory combines a careful retreat with a concealed ambush, and its settlement is as consequential as its battlefield result: Kong Ming pardons the captured commander Yadan, and the Qiang return to their own lands, pledging not to rebel again.

Causes and Forces

The conflict begins with a Wei effort to enlist the Qiang against Shu. Guo Huai reminds Cao Zhen that the Qiang have paid tribute to the imperial court for years. He proposes sending an imperial princess to marry into the chieftain’s family in exchange for Qiang soldiers. Cao Zhen sends a formal proposal, and within weeks a force of 150,000 Qiang warriors advances toward Xiping Pass with iron-plated war wagons, some drawn by horses and others by camels.

The Shu commander Han Zhen is responsible for the pass. Zhang Bao and Guan Xing volunteer to assist him, although Kong Ming warns that they do not know the terrain well. Despite those reservations, they set out with 50,000 men. The disparity between the force they face and their limited familiarity with the area helps explain why their first encounter goes so badly.

The First Defeat

In the initial engagement, the Qiang lines part as the Shu troops advance. The iron wagons emerge from behind them, carrying archers and crossbowmen whose attack breaks the Shu advance. Guan Xing is caught in the rout and pursued by Yueji. He and his horse leap into a river, but Yueji’s blow fells the horse and throws Guan Xing into the water. He escapes immediate capture and takes Yueji’s horse, but the episode leaves the Shu forces without an answer to the wagons’ apparent invulnerability.

Guan Xing and Zhang Bao return to camp, where Ma Dai admits that he does not know how to defeat the wagons and has written to Kong Ming for help. Their initial failure establishes the problem the later stratagem must solve: a direct attack lets the Qiang deploy the wagons’ archers and crossbowmen to devastating effect.

Kong Ming’s Winter Stratagem

Kong Ming arrives, studies the enemy’s wagons, and makes the approaching winter weather part of his plan. He sends commanders and troops on separate assignments. Jiang Wei is to advance against the Qiang lines and then retreat, leaving an apparent route for an attack on the Shu camp. When the Qiang pursue, they see Kong Ming’s carriage leaving through the rear gate and follow it across the snow-covered landscape. Yueji and Yadan lead the pursuit, with the wagons rolling forward as confidently as before.

The retreat draws the force where Kong Ming wants it. Pits concealed under the snow give way beneath the iron wagons, which crash into them and are disabled. From both sides, Shu troops rain arrows into the trapped force. Jiang Wei, Ma Dai, Zhang Yi, Guan Xing, and Zhang Bao take part in the attack. Guan Xing kills Yueji, while Yadan is captured. The decisive reversal comes not from matching the wagons in a direct contest, but from making their progress across the terrain the means of their defeat.

Settlement and Consequences

Kong Ming pardons Yadan. In response, the Qiang pledge not to rebel again and depart for their own lands. The outcome therefore extends beyond the capture of a pass or the defeat of a field force: the enemy’s withdrawal follows an agreement rather than a further pursuit or an account of continued fighting. The pardon is central to that resolution, connecting military victory to the political work of securing a lasting submission.

The episode’s structure contrasts an initial rout with a victory achieved through restraint, terrain, and deception. The Qiang wagons first appear invincible because their weapons dominate an exposed advance; in the snow, the same confidence carries them into hidden pits. Kong Ming’s stratagem turns winter from a hindrance into a military resource, while the pardon of Yadan converts the battlefield outcome into a promise of future non-rebellion.