西汉第一次定襄出击 / First Dingxiang Campaign (Western Han)

Overview

西汉第一次定襄出击 / First Dingxiang Campaign is the episode-defined February 123 BCE operation in which 卫青 leaves Dingxiang, destroys a 匈奴 rear guard, then withdraws because the chanyu’s main force remains unlocated. Its significance lies in the decision not to convert a quick local success into an unsupported claim of campaign control.

Current Profile

Hanji 296-1 presents the operation as a prepared direct advance. 汉武帝 supplies a mixed command team: 赵信 contributes opponent knowledge, 张骞 contributes grassland route and water knowledge, 李沮 commands a strong-crossbow force, and 公孙贺 and 苏建 support maneuver.

The first contact is reportedly a Xiongnu rear guard rather than the chanyu’s main army. Han forces rapidly envelop and defeat it, but Wei Qing reads the missing main body as unresolved danger. He returns to the Dingxiang-Yunzhong-Yanmen frontier area, rests the troops, and sends scouts before the next operation.

The later 西汉第二次定襄出击 is a separate event: it begins with another departure, divides into three search routes, and leads into the right wing’s destruction. Keeping the campaigns distinct prevents the first sortie’s rear-guard battle and deliberate reset from being merged with the later central engagement and command-law case.

Key Characteristics

• Prepared direct sortie from Dingxiang toward a mobile opponent whose decisive formation is not fixed in place.
• Multi-role command design combining maneuver leaders, opponent knowledge, route guidance, and crossbow support.
• Rapid local victory against a rear guard rather than confirmed defeat of the chanyu’s main force.
• Deliberate withdrawal, rest, and reconnaissance after success instead of immediate deep pursuit.
• Operational prelude kept distinct from the later three-route second Dingxiang campaign.

Evidence

Command design and contact:

• Hanji 296-1 describes the Dingxiang departure, specialist command team, rear-guard encounter, enveloping attack, and crossbow support.

Local result and reset:

• Hanji 296-1 reports several thousand enemy killed, but also says Wei Qing recognizes that the chanyu is absent, withdraws to rest, and sends reconnaissance before renewed action.

Qualifications

This profile rests on one six-minute popular-history summary rather than a primary-text campaign reconstruction. The “first Dingxiang campaign” label is used to distinguish the episode sequence from Hanji 296-2’s explicitly renewed departure. Exact dating, routes, offices, force sizes, casualty totals, pincer geometry, crossbow effect, chanyu location and intent, withdrawal destinations, and scouting sequence remain episode-attributed. A rear-guard victory does not establish destruction of the main force or general Han superiority across the campaign.

What Changed

• Created a separate event identity for the first sortie so its local victory and reconnaissance reset are not merged with the later three-route operation.
• Defined the event around unresolved enemy-main-force location rather than the promotional “吊打” frame.

Relationships

• 卫青 - commander who stops after the local victory and reopens reconnaissance.
• 匈奴 - opponent whose rear guard is defeated while its main force remains outside contact.
• 赵信 - front commander valued for knowledge of Xiongnu organization and movement.
• 张骞 - route and water guide in the episode’s account.
• 公孙贺 - left-side maneuver commander in the reported engagement.
• 苏建 - right-side maneuver commander before his later defeat in the second sortie.
• 李沮 - strong-crossbow commander supporting the reported encirclement.
• 局部胜利与战役态势不确定性 - conceptual relationship separating contact success from campaign knowledge.
• 西汉第二次定襄出击 - subsequent, distinct operation after rest and reconnaissance.