《资治通鉴·汉纪》296-1｜卫青挂帅出征，为汉朝吊打匈奴

Summary

This short 芮淇讲透资治通鉴 episode follows 卫青’s first 元朔六年 departure from Dingxiang against the 匈奴. 汉武帝 supplies a command team combining cavalry leaders, the Xiongnu-origin 赵信, the grassland route knowledge of 张骞, and a dedicated crossbow force under 李沮.

The Han army rapidly destroys a rear-guard formation, but Wei Qing does not treat several thousand reported kills as proof that the campaign objective has been met. Because the chanyu’s main force remains unlocated, he withdraws to the frontier commanderies, rests the army, and sends scouts before the next operation. The episode’s durable contribution is 局部胜利与战役态势不确定性: a favorable contact result can increase the need for reconnaissance when it reveals that the decisive enemy force is elsewhere.

Key Claims

• In February 123 BCE, Wei Qing reportedly leaves Dingxiang for a direct anti-Xiongnu operation along the shortest approach toward the chanyu’s eastern pasture area.
• The episode says earlier victories have supplied captured material, frontier experience, and confidence, making the expedition cumulative rather than improvised.
• Han Wudi assigns 公孙贺, 苏建, 李广, Zhao Xin, Li Ju, and Zhang Qian to roles spanning maneuver, opponent knowledge, route guidance, and missile support.
• Zhao Xin is presented as a former Xiongnu lesser king and chancellor who entered Han service; the host treats his appointment to the front as a way to improve the search for the chanyu’s main force.
• Zhang Qian’s captivity-era familiarity with grassland geography, pasture, and water is presented as route and sustainment knowledge rather than only diplomatic experience.
• Zhao Xin first meets a Xiongnu rear guard; Gongsun He and Su Jian reportedly envelop it while Li Ju’s crossbow troops provide dense fire, ending the engagement quickly with several thousand enemy killed.
• Wei Qing infers from the easy local victory that the chanyu’s main body is absent and may be positioned for a counterstroke, so he returns to Dingxiang, Yunzhong, and Yanmen to rest and reconnoiter before moving again.

Key Quotes

“别人从胜利当中看到了功名利禄，卫青却从胜利当中闻到了危险的气息。” - the episode’s central contrast between visible success and unresolved campaign risk.

“清醒冷静，是卫青在众多名将当中最大的特点。” - the host’s character judgment based on the decision to stop, verify, and prepare again.

Connections

• 西汉第一次定襄出击 - initial February operation ending in a rear-guard victory, withdrawal, and renewed reconnaissance.
• 卫青 - commander who distinguishes the destroyed rear guard from the missing chanyu main force.
• 赵信 - Xiongnu-origin front commander used for opponent knowledge before his later return to Xiongnu.
• 张骞 - guide whose grassland route and water knowledge supports the expedition.
• 公孙贺 and 苏建 - flanking commanders in the reported rear-guard engagement.
• 李沮 - commander of the episode’s dedicated strong-crossbow formation.
• 局部胜利与战役态势不确定性 - distinction between winning the encountered battle and locating or controlling the decisive enemy force.
• 西汉第二次定襄出击 - next operation, where a renewed three-route search again produces local success without complete control.

Contradictions

• No settled contradiction is adopted. The episode supplies the first Dingxiang sortie before Hanji 296-2’s second departure and Hanji 297’s right-wing disaster; those operations must not be merged.
• The source’s compressed account does not independently establish the exact route from Dingxiang, the “eastern pasture” geography, captured supplies, command titles, pincer geometry, crossbow deployment, duration, casualty total, chanyu plan, or the three-commandery withdrawal sequence.
• Zhao Xin’s earlier Xiongnu title and chancellorship, Zhang Qian’s precise guide function, and the episode’s claim that each was uniquely knowledgeable remain source-scoped pending primary-text and specialist comparison.
• The opening 《菜根谭》 maxim and the language of “吊打” frame preparation and composure rhetorically; they do not establish effortless Han superiority or a complete campaign victory.