主攻与侧翼牵制 / Main Effort and Flank Containment

Definition

主攻与侧翼牵制 / Main Effort and Flank Containment is an operational arrangement that concentrates decisive combat power against a selected target while assigning another force to occupy, monitor, delay, or deter a separate enemy formation that could reinforce it.

Current Synthesis

The 124 BCE Gaoque campaign opening supplies the current bounded case. 汉武帝 reportedly places the main force under 卫青 against the Xiongnu Right Wise King, while Li Xi and Zhang Cigong move from Right Beiping to constrain the Left Wise King. The two tasks are asymmetric: one seeks the target’s camp and possible destruction; the other protects that concentration by reducing the chance that another powerful wing can intervene.

The arrangement depends on more than having two routes. The containment force must be credible enough to influence the reinforcing enemy, while distance, reconnaissance, communications, and timing must keep the main effort from being isolated. In the current source, only the intended division of labor is visible. The text ends before showing whether the containing force fixed the Left Wise King, whether reinforcement was attempted, or whether the overall design produced the teased victory.

Key Claims

• Concentration against one target can require accepting thinner coverage elsewhere rather than distributing forces evenly.
• A secondary force can contribute without defeating its opponent if its presence delays, deters, monitors, or redirects reinforcement.
• Main and containing forces need distinct objectives; calling both “attacks” obscures how their success conditions differ.
• Geographic separation raises coordination risk because the main force may not know whether containment is working when it commits to pursuit.
• An enemy withdrawal can preserve the logic of the main effort while changing its practical problem from attack to reconnaissance, resupply, and pursuit.

Evidence

Concentration and role separation:

• Hanji 290-1 assigns Wei Qing and several subordinate commanders to the Right Wise King while a separate Right Beiping force is tasked against the Left Wise King.

Reinforcement-control purpose:

• Hanji 290-1 explicitly interprets the eastern deployment as preventing the Left Wise King from moving west to support the Right Wise King.

Pursuit transition:

• Hanji 290-1 says the main force finds the first camp empty, rests and resupplies, and begins planning a deeper movement around enemy reconnaissance.

Counterevidence & Qualifications

The source reports intended tasking, not demonstrated containment success. It does not show the Left Wise King’s response, contact by the eastern force, communications between columns, reinforcement timing, or the final campaign outcome. The concept therefore distinguishes roles without claiming that every secondary deployment actually fixes an enemy or that force concentration is always superior. A weak containing force can be bypassed or defeated, and a pursuing main force can outrun reconnaissance and supply.

What Changed

• Created the concept from the episode’s explicit division between attacking the Right Wise King and containing possible reinforcement from the Left Wise King.
• Added the empty-camp transition to show how withdrawal changes execution without automatically invalidating the original force-allocation logic.

Related Concepts

• 西汉高阙出击右贤王 - bounded campaign case that separates the main effort from eastern containment.
• 局部胜利与战役态势不确定性 - adjacent principle that battlefield contact does not settle wider enemy and friendly-force positions.
• 战场信息控制 - reconnaissance relationship determining whether separated forces understand enemy movement and each other’s progress.
• 急行军作战风险 - pursuit relationship in which tempo can outrun route, supply, and coordination knowledge.