《资治通鉴·汉纪》374-2｜汉武帝倾尽全力打大宛，值不值？

Summary

This 芮淇讲透资治通鉴 episode narrates 汉武帝’s second expedition against 大宛 as a state-scale response to the first campaign’s failure. The court reinforces 李广利 with troops, transport animals, grain, weapons, engineers, frontier garrisons, and horse specialists; after the destruction of Luntai intimidates other oasis states, more than thirty thousand Han troops reach Dayuan, divert its water, and maintain a siege for over forty days.

The durable synthesis is a qualified decisive-resource-commitment case. Overwhelming force and logistical preparation help Han obtain horses, provisions, a settlement, and a friendly king without completing the destruction of Dayuan, but the episode gives little accounting of civilian deaths, forced levies, transport losses, or the opportunity cost of the campaign. Its larger claim—that the expedition cut the Xiongnu’s “right arm” and established Han prestige in the Western Regions—remains the program’s strategic interpretation rather than a settled cost-benefit verdict.

Key Claims

• Han Wudi turns the second Dayuan expedition into a national mobilization by sending more than sixty thousand troops toward Dunhuang, excluding privately equipped followers, plus large numbers of cattle, horses, donkeys, camels, grain, weapons, and tools.
• Intelligence that Dayuan’s capital lacks wells leads Han to send hydraulic workers, while eighteen wan settlers or troops are placed north of Jiuquan and Zhangye and forces are stationed around Juyan and Xiutu to protect the corridor.
• The army includes recruited prisoners, fugitives, merchants, sons-in-law, and officials with offenses, as well as specialists appointed to select and drive horses after victory.
• Luntai resists, is taken after several days, and is massacred; the episode presents this violence as the intimidation that makes later oasis states open their gates and supply the Han army.
• Li Guangli reaches Dayuan with more than thirty thousand soldiers, defeats an attempted field defense, diverts the city’s water, and maintains a siege for more than forty days.
• Dayuan nobles kill King Wugua, offer his head, horses, and grain, and warn that continued attack will cause them to kill the horses while Kangju relief threatens the Han rear.
• After learning that Dayuan still has grain and captured Han well-diggers, Li Guangli accepts the settlement, selects several dozen superior horses and more than three thousand other horses, and installs the Han-friendly noble Meicai as king.
• The host judges the campaign strategically valuable because it pressures Xiongnu influence, raises Han prestige among Western Regions states, and deepens contact, but the episode does not independently calculate whether those gains outweighed the full human and fiscal cost.

Key Quotes

“断匈奴右臂” - the episode’s strategic justification for the Western Regions campaign.

“即使最后攻下来，也什么都得不到” - Dayuan’s bargaining threat that it would kill the horses if Han continued the siege.

Connections

• 汉武帝 - ruler who escalates the failed first expedition into a state-scale mobilization.
• 李广利 - commander who advances through Luntai, besieges Dayuan, and accepts a negotiated settlement.
• 大宛 - target polity whose nobles remove the king and trade horses, grain, and a political settlement for withdrawal.
• 康居 - potential relief power whose army stays back after judging the Han force too strong.
• 匈奴 - wider strategic rival whose Western Regions position the host says Han sought to weaken.
• 决断型资源投入 - the campaign succeeds after overwhelming reinforcement, while also exposing the boundary between sufficient force and excessive cost.
• 边疆战略成本分型 - adjacent framework for judging whether prestige and geopolitical gain justify a distant campaign’s full burden.

Contradictions

• No settled contradiction with existing wiki content was found. The source adds the missing Dayuan campaign to Li Guangli’s profile and makes Hanji 723’s broad Western Regions strategy concrete.
• Scope caution: troop and animal totals, the identity of the “seven categories” of recruits, the Luntai massacre, hydraulic details, siege duration, Wugua and Meicai name forms, horse totals, and the causal claim that the victory decisively weakened Xiongnu remain episode-attributed pending primary-source verification.
• Evaluation tension: the episode calls the expedition strategically worthwhile while supplying only limited evidence about casualties, coercive recruitment, civilian harm, animal loss, and fiscal opportunity cost; the wiki preserves that imbalance rather than treating “worth it” as settled.