辽城 / Liao City (Warring States)
辽城 / Liao City enters the wiki through 《资治通鉴·秦纪》101-1|这位倒霉君王登基三天即猝死 as the 齐国 city captured by a 燕国 force during 燕王喜’s broader attempt to exploit eastern-state weakness. The episode says the Yan commander holding the city is then slandered to Yan Wang Xi as rebellious.
The city becomes important because it turns a battlefield situation into a political trap. 田单 besieges it for more than a year without success, while the commander inside cannot continue attacking, cannot safely return to Yan, and cannot trust that surrender to Qi will spare him. 鲁仲连’s arrow letter breaks that stalemate by forcing the commander to judge his available exits.
After the commander kills himself, the leaderless Yan force loses cohesion and Tian Dan recovers Liaocheng. The episode therefore treats the city as the setting for 辽城守将进退困局 and for Lu Zhonglian’s persuasion turning into a military result.