师出有名 shī chū yǒu míng having a just cause

Explanation

指军事行动或其他行动有正当的理由。强调行动的正义性和合理性。

Refers to military or other actions that have legitimate reasons. It emphasizes the justice and reasonableness of the actions.

Origin Story

楚汉相争时期，刘邦实力远不如项羽，但他善于利用时机，巧妙地制造各种有利于自己的形势。公元前205年，项羽率兵北上攻打齐国，刘邦抓住这个机会，从陕西临晋渡过黄河，迅速收服了魏王豹，然后兵临洛阳。新城县令董公建议刘邦应该师出有名，以名正言顺的名义出兵。于是，刘邦便以项羽杀害义帝为由，举哀三天，号召各路诸侯起兵讨伐项羽。这不仅鼓舞了士气，也赢得了天下舆论的支持，最终刘邦一举攻下了楚国的都城彭城。这便是历史上著名的“师出有名”的典故。此后，刘邦的势力迅速壮大，最终战胜项羽，建立了汉朝。这个故事说明，即使力量弱小，只要能够找到合理的理由，并掌握有利的时机，也能取得最终的胜利。

chuhanxiangzheng shiqi, liubang shili yuan buru xiangyu, dan ta shanyuliyong shiji, qiaomiaode zhizao gezhong youli yu zijide xingshi. gongyuan qian 205 nian, xiangyu shu bing bei shang gong da qiguo, liubang zhua zhu zhege jihui, cong shanxi linjin duoguo huanghe, xunsu shoufu le wei wang bao, ranhou binglin luoyang. xincheng xian ling donggong jianyi liubang yinggai shi chu you ming, yi mingzhengyanshun de mingyi chubing. yushi, liubang bian yi xiangyu shahai yidi wei you, ju ai san tian, haozhao ge lu zhuhou qibing taofa xiangyu. zhe bujin guwu le shiqi, ye yingle tianxia yulun de zhichi, zhongjiu liubang yiju gong xia le chuguode du cheng pengcheng. zhe bian shi lishi shang zhuming de 'shi chu you ming' de diangu. cihou, liubang de shili xunsu zhuangda, zhongjiu zhansheng xiangyu, jianli le hanchao. zhege gushi shuoming, jishi liliang ruoxia, zhiyao nenggou zhaodao helide liyou, bing zhangwo youli de shiji, yeneng qude zhongjiude shengli.

During the Chu-Han contention, Liu Bang's strength was far inferior to Xiang Yu's, but he was adept at seizing opportunities and cleverly creating situations advantageous to himself. In 205 BC, Xiang Yu led his troops north to attack the state of Qi. Liu Bang seized this opportunity, crossed the Yellow River from Linjin in Shaanxi, quickly subdued King Wei Bao, and then approached Luoyang. The magistrate of Xincheng suggested that Liu Bang should have a legitimate reason for his military action. Thus, Liu Bang used Xiang Yu's murder of Yi Di as a pretext, held a three-day mourning ceremony, and called on various feudal lords to rise up against Xiang Yu. This not only boosted morale but also won the support of public opinion, ultimately leading Liu Bang to capture Pengcheng, the capital of Chu. This is the famous historical anecdote of "having a just cause". Afterwards, Liu Bang's power grew rapidly, eventually defeating Xiang Yu and establishing the Han Dynasty. This story illustrates that even with weaker power, one can achieve ultimate victory by finding justifiable reasons and seizing opportune moments.

Usage

常用于形容战争或重大行动的正当性，也比喻做任何事情都有充分的理由。

chang yong yu xingrong zhanzheng huo zhongda xingdong de zhengdangxing, ye biju zuo renhe shiqing dou you chongfen de liyou.

Often used to describe the legitimacy of wars or major actions, it is also used figuratively to mean having sufficient reasons for anything.

Examples

• 这次军事行动师出有名，得到了国际社会的广泛支持。

  zheci junshi xingdong shi chu you ming, dedao le guojishehui de fangguan zhichi.

  This military operation had a legitimate basis and received widespread international support.

• 他的辞职，师出有名，理由充分。

  ta de ciren, shi chu you ming, liyou chongfen

  His resignation was well-founded and had sufficient reasons

Related Idioms

• 兵出有名

• 正义之师

Opposite Idioms

• 师出无名