Succession-Crisis Intervention / 继承危机外部干预

Succession-crisis intervention / 继承危机外部干预 is the pattern 《资治通鉴·周纪》10丨 以家族单位 有蚂蚁吃大象的精神（3） draws from 魏国 after 魏武侯’s death. When 魏罃 and 公中缓 fight for succession, Gongzhong Huan seeks help from 赵国, while 韩国 also treats Wei’s disorder as an attack opportunity.

The concept extends Succession Non-Designation Risk / 未定继承人风险. Unclear succession does not only create internal factional struggle; it can also export the conflict into interstate politics because neighboring powers can back a claimant, seize territory, or try to redesign the target state.

Key Claims

• An unresolved succession creates an invitation for external powers when one claimant needs outside support.
• Outside intervention can be framed as restoration, but still be driven by land, leverage, or long-term threat reduction.
• Information from defectors or exiles can make the target’s weakness more legible to rivals.
• A succession crisis becomes more dangerous when the target state was previously strong enough to make neighbors fear its recovery.

Connections

• Succession Non-Designation Risk / 未定继承人风险 - upstream governance failure.
• 魏国, 魏武侯, 魏罃 / 梁惠王, and 公中缓 - source case.
• 王绰, 公孙齐, 韩懿侯, and 赵成侯 - information and intervention actors.
• 浊泽之战, 安邑, and Coalition Settlement Failure / 联军战后安排失败 - campaign and failed settlement sequence.
• Early Warring States Interstate War / 战国早期诸侯混战 - broader period pattern of opportunistic, multi-actor conflict.