白马之围 / White Horse Relief (late Han)

Overview

白马之围 / White Horse Relief (late Han) is the pre-官渡之战 action in which 曹操 relieves 刘延 at White Horse after 袁绍 sends 颜良 forward. In the current wiki it functions as the missing tactical bridge between Yuan Shao’s decision to move south and the later 延津之战 aftermath.

Current Profile

The event profile has three linked parts. First, Yuan Shao’s side turns strategic pressure into a forward attack by sending Yan Liang against Liu Yan, despite 沮授’s warning that Yan Liang is brave but too impulsive and narrow for independent command. Second, Cao Cao does not solve the siege by frontal equality; a Cao-side adviser argues that Cao’s smaller force must split Yuan’s army by pretending to cross the Yellow River and threaten Yuan’s rear. Third, after Yuan Shao divides troops westward, Cao advances rapidly on White Horse and uses 张辽 and 关羽 as the vanguard, where Guan Yu kills Yan Liang and lifts the siege.

Key Characteristics

• Pre-Guandu relief action rather than the decisive Guandu battle itself.
• Yuan-side forward attack that exposes a famous general to independent-command risk.
• Cao-side deception maneuver built around a feigned Yellow River crossing and rear threat.
• Time-gap battle: Yuan Shao reacts west while Cao’s light force closes quickly on White Horse.
• Guan Yu repayment battlefield: Yan Liang’s death becomes the concrete merit later tied to Guan Yu’s departure from Cao’s camp.

Evidence

• Campaign placement: Hanji 1043 places the White Horse crisis in Jian’an 5 / 200 CE as Yuan Shao moves south before the Guandu confrontation.
• Target and warning: Hanji 1043 says Yuan Shao sends Yan Liang to attack Dong Commandery administrator Liu Yan at White Horse and that Ju Shou warns against using Yan Liang alone.
• Deception plan: Hanji 1043 describes the advice to feign a river crossing and rear attack so Yuan Shao divides forces westward.
• Rapid strike: Hanji 1043 has Cao Cao advance fast enough that Yan Liang learns of the approach only when Cao is within roughly ten li and must fight hastily.
• Siege relief: Hanji 1043 credits Guan Yu with charging toward Yan Liang’s banner, killing him, taking the head, and thereby lifting White Horse’s siege.

Qualifications

The current evidence comes from one source note, so the page should remain a compact event bridge rather than a complete military reconstruction. The source names White Horse and Liu Yan but does not give enough geography, order-of-battle, or casualty detail to infer the entire engagement. The host’s claim about Guan Yu’s act being uniquely recorded in the Three Kingdoms era remains source-scoped.

What Changed

• Created this event page to separate the Hanji 1043 White Horse relief from Hanji 1044’s later Yanjin and Guan Yu departure sequence.

Relationships

• 官渡之战 - larger campaign horizon in which White Horse functions as an opening relief action.
• 延津之战 - next preliminary battle after Yan Liang’s death triggers Yuan Shao’s angry southward pursuit.
• 曹操 - relieving commander who adopts the diversion and then moves quickly on White Horse.
• 袁绍 - opposing commander whose force is divided by the feigned rear threat.
• 颜良 - Yuan-side attacker killed during the relief.
• 关羽 - Cao-side vanguard general whose killing of Yan Liang resolves the siege.
• 张辽 - vanguard commander paired with Guan Yu in Cao Cao’s relief force.
• 刘延 - Dong Commandery administrator under attack at White Horse.
• 沮授 - Yuan adviser whose warning against Yan Liang’s independent command is ignored.
• 诱敌离位 - tactical concept illustrated by pulling Yuan forces away from the true relief target.
• 围魏救赵 - related indirect-relief pattern based on threatening what the attacker must protect.