东郡 / Dong Commandery
东郡 / Dong Commandery enters the wiki through 《资治通鉴·秦纪》106｜惊人发现信陵君的非正常死亡 as the 秦国 commandery created in 242 BCE after 蒙敖 attacks 魏国 and captures twenty cities. The source treats it as the administrative result of Qin continuing to move east even after the prior year’s locust and epidemic disasters.
Its importance is strategic rather than merely bureaucratic. By turning captured Wei territory into a commandery, Qin converts campaign gains into governed space, making 秦国东进压力 harder for the eastern states to reverse. The episode also says Wei’s weakening removes a central-plains support point for future 合纵 efforts.
Dong Commandery therefore belongs with 三川 and 太原 as late-Warring-States Qin administrative consolidation. In this source, the commandery shows that disaster did not interrupt Qin’s expansion tempo for long.
《资治通鉴·秦纪》107｜最后一次合纵伐秦 伐了个寂寞 keeps Dong Commandery in the next episode’s pressure map. After the final anti-Qin 合纵 fails, Qin continues by taking Chaoge and Puyang in the source’s summary and associating those gains with Dong Commandery. The episode’s transcript also carries a Wei/Wey wording ambiguity around 卫元君 and 卫君角, so this page records the administrative-pressure point without collapsing 魏国 and 卫国.
《资治通鉴·秦纪》126｜秦始皇死因之谜（1） gives Dong Commandery a late-Qin omen role. In Qin Shi Huang’s thirty-sixth year, a meteor falls there and is inscribed with “始皇死而地分,” becoming part of 秦始皇晚年异象危机. The source reads the event as a public-resentment signal and also marks source-critical uncertainty around whether the transmitted wording was exactly contemporary.
Hanji 184 gives Dong Commandery an early-Western-Han reassignment note. After 彭越 is removed, 刘邦 abolishes Dong Commandery into the Liang kingdom while assigning Liu-family kingship over the region, making it part of the 同姓王分封 replacement map.
Hanji 957 adds the immediate late-Han office opening before Hanji 961. 鲍信 urges 曹操 to use Dong Commandery as a foothold against 袁绍’s growing northern position, and 王肱’s inability to withstand 黑山军-linked attackers creates the practical opening.
The source names 于毒, 白绕, and 眭固 in the attacking field. Cao Cao defeats Bai Rao around 濮阳, receives Yuan Shao’s recommendation as administrator, and places the commandery office at 东武阳. This makes Dong Commandery the bridge between Bao Xin’s early strategy and Cao Cao’s later Neihuang operations.
Hanji 961 adds a late-Han Cao-side use before the Zang Hong branch. 程昱 is introduced as a Dong Commandery man whose advice helps 刘岱 survive 公孙瓒’s pressure, while 曹操 later holds a command position in the same regional field around 顿丘, 东武阳, and 内黄之战.
Hanji 996 adds a late-Han use. 臧洪 is serving as Dong Commandery administrator when 张超 is trapped at 雍丘. After 袁绍 refuses rescue and Zhang Chao is killed by 曹操, Dong Commandery becomes the place where Zang Hong’s old-superior loyalty turns into armed resistance, siege, starvation, and mass death.
Connections
- Hanji 957, 鲍信, 曹操, 王肱, 白绕, 濮阳, and 东武阳 - office opening and early Cao-side foothold.
- Hanji 961, 程昱, 曹操, 顿丘, 东武阳, and 内黄之战 - late-Han advice and early Cao-side campaign field.
- Hanji 184, 彭越, 刘邦, and 同姓王分封 - early-Han incorporation into the Liang replacement map.
- Hanji 996, 臧洪, 袁绍, 张超, and 雍丘 - late-Han siege and loyalty branch.
- 秦国, 嬴政 / 秦始皇, and 蒙敖 - state, ruler frame, and commander attached to its creation.
- 魏国, 魏安釐王, and 魏景湣王 / 魏增 - target state and succession context.
- 秦国东进压力 and 合纵 - expansion and coalition-consequence frames.
- 三川 and 太原 - adjacent Qin commandery-consolidation examples.
- 末次合纵失败, 卫国, 卫元君, 卫君角, and Qinji 107 - post-coalition territorial pressure and source-scoped Wei/Wey ambiguity.
- 秦始皇晚年异象危机, 祥瑞政治, and Qinji 126 - meteor inscription and late Qin death-omen narrative.