秦文公 / Duke Wen of Qin
秦文公 / Duke Wen of Qin appears in 《资治通鉴·周纪》10丨 以家族单位 有蚂蚁吃大象的精神（1） at the end of the source’s 秦国 origin digression. The host says Qin had to recover the land granted by 周平王 from the Quanrong and only drove them out by Qin Wen Gong’s generation.
His source role is to show that recognition and actual control are different. Qin may receive status and land claims through 秦襄公, but territorial possession still requires later effort.
《资治通鉴·秦纪》120-2｜秦朝第一套VI设计理念 adds a later retrospective use of Qin Wen Gong through the black-dragon omen. The episode says a tradition that a black dragon appeared from water during his hunt becomes useful after unification because it supports 秦国’s claim to water virtue under 阴阳五行政治理论.
Connections
- 秦国 - polity whose early territory is at issue.
- 秦襄公 and 周平王 - grant and recognition context.
- Kinship Legitimacy Diplomacy / 同源合法性外交 - origin-story frame in which Qin’s rise is narrated.
- Territorial Control Churn / 城池反复易手 - adjacent concept for the gap between claim and control.
- Qinji 120-2, 祥瑞政治, and 帝国符号标准化 - black-dragon omen reused for water-virtue legitimacy.