城下之盟

Explanation: A hope that when the enemy was forced to yield the peace treaty signed. 　　Usage: Partial official; as subject, object; used for political and military aspects 　　Source: Pre Hengyu "Zuo Huan years": "defeat it, but also for the Chengxiazhimeng." 　　Examples: The shape of state has been trapped, people do not storm the Notes. Jun Min Xiao Si, and the City all broken, Qiken is ~ zai. (Ming Feng Meng, "Eastern Zhou Chi," the fifty-fifth back) Thesaurus:  unexpected happenings, be impelled by necessity, doings ofghosts and gods— — unexpected happenings, Angel Ghost severance, body Cannot but main, all sorts of have no choice, flowers will die,do what one may, by absolute necessity