城下之盟 chéngxiàzhīméng

chéngxiàzhīméng set phrase to make an alliance under the city walls
Domain: Idiom 成语 , Subdomain: , Concept:
Notes: To agree to peace under force from an enemy, from a story in the 左传 Zuo Zhuan (Guoyu '城下之盟'; Mathews 1931 '城下之盟', p. 49)