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.
Connections
- 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.