Encircling Wei to Rescue Zhao / 围魏救赵

Definition

Encircling Wei to rescue Zhao / 围魏救赵 is a pressure-displacement strategy: instead of rescuing the endangered point directly, a commander attacks what the aggressor must protect, forcing the aggressor to leave its chosen battlefield or accept loss elsewhere.

Current Synthesis

The current evidence presents the strategy as a reusable but execution-sensitive pattern. Zhouji 15 supplies the setup before the classic execution: 魏国 surrounds 邯郸 after 魏惠王 reads 楚国’s attack on 鲁国 as a distraction, while 景舍 and the coming 田忌 / 孙膑 branch show that multiple rescue options are in play.

Zhouji 16 gives the canonical 桂陵之战 logic. Sun Bin rejects direct rescue of Zhao at Handan and tells Tian Ji to attack 大梁 instead. The move works because Wei cannot ignore its own core point, so the rescuer changes the tempo and place of decision.

Zhouji 19 extends the logic into the 马陵之战 setup. 齐国 rescues 韩国 by again moving toward Daliang, but this time the source also emphasizes timing and forced-march risk after the pressure target pulls 庞涓 away from the Han front.

Hanji 961 shows the pattern at a smaller late-Han operational scale. When 于毒 attacks 东武阳, 曹操 threatens Yu Du’s own base, forcing Yu Du to return and lifting the siege before Cao Cao advances to fight 眭固 and 于扶罗.

A negative Eastern Han case appears in Hanji 690. 刘秀 advises 盖延 to attack Tan so 董宪 will abandon the Lanling siege. Gai Yan instead goes directly to Lanling, is drawn in by Dong Xian’s feigned retreat, fails to take Tan afterward, and loses the surrendered Ben Xiu. The pattern is therefore not just a maxim; it depends on actually striking the enemy’s must-save point before direct rescue traps the rescuer.

Key Claims

• The relevant target is not always the place where the ally is suffering.
• The strategy depends on reading what the enemy cannot politically or militarily ignore.
• Attacking a must-save point can convert rescue from reactive reinforcement into tempo control.
• The pattern repeats across scales, from Warring States interstate war to late-Han and Eastern Han campaign situations.
• Timing matters: a delayed or mis-sequenced indirect strike can become an ordinary failed relief operation.
• Successful use requires commanders to follow the displacement logic instead of reverting to the emotionally obvious rescue route.

Evidence

• Setup before the classic case: Zhouji 15 frames Wei’s siege of Handan as part of a wider Chu-Lu-Zhao chain before Qi’s intervention.
• Canonical displacement: Zhouji 16 has Sun Bin tell Tian Ji to attack Daliang instead of rescuing Handan directly.
• Repeat with timing and forced-march risk: Zhouji 19 repeats the Daliang pressure point while adding delayed-rescue timing and Pang Juan’s forced response.
• Late-Han application: Hanji 961 says Cao Cao threatens Yu Du’s base so Yu Du leaves Dong Wuyang.
• Failed Eastern Han execution: Hanji 690 says Liu Xiu proposes an indirect attack on Tan to lift Lanling, but Gai Yan goes directly to Lanling and Dong Xian converts the rescue into a trap.

Counterevidence & Qualifications

The current examples support the strategy as a target-selection and timing principle, not as a guaranteed formula. Zhouji 15 is mostly setup rather than execution, so the full classic pattern depends on Zhouji 16. Zhouji 19 shows that repeated use can still impose forced-march risk and requires careful timing. Hanji 690 is the strongest qualification because Liu Xiu’s proposed indirect move is not carried out: the failed outcome belongs to misexecution, not to proof that the strategy itself is invalid. Direct rescue may still be necessary when no must-save target exists, when the ally cannot survive the delay, or when the attacker can ignore the threatened point.

What Changed

• Migrated the page to knowledge_schema: synthesis-v1 with the required concept section order.
• Added Hanji 690 as a failed-execution case where Liu Xiu proposes indirect relief but Gai Yan chooses the direct Lanling route.
• Preserved Zhouji 15 as the prehistory/setup layer for the classic Handan crisis.
• Preserved Zhouji 16 and Zhouji 19 as the Guiling and Maling Warring States strategy layers.
• Preserved Hanji 961 as a smaller late-Han operational application through Cao Cao.

Related Concepts

• Lure Enemy Out of Position / 诱敌离位 - related because both patterns make the opponent move away from its preferred battlefield.
• Tian Ji Horse Racing / 田忌赛马 - parallel Sun Bin pattern that accepts local asymmetry to win the larger contest.
• Delayed Rescue Statecraft / 晚救权谋 - timing relationship because rescue may be intentionally delayed before the indirect pressure point is struck.
• Forced-March Operational Risk / 急行军作战风险 - downstream risk when the enemy is forced to abandon one front and rush toward another.
• Battlefield Feint And Lure / 声东击西与诱敌 - adjacent tactical pattern because false movement can either support pressure displacement or, as Dong Xian shows, punish a direct rescuer.
• 盖延 / Gai Yan (Eastern Han) - negative execution case: his direct Lanling rescue fails where Liu Xiu had advised a Tan pressure strike.
• 董宪 / Dong Xian (Eastern Han) - opponent who exploits Gai Yan’s direct rescue by feigning retreat and retaking Lanling.