The opening chapter of 《
左传》(Zuo Zhuan, compiled c. 4th c. BCE, narrating 722 BCE). Duke Zhuang of Zheng (
郑庄公, here titled
伯 'Earl' per the Zuo's deliberate demotion of rank) allows his younger brother
共叔段 to overreach, traps him into rebellion, and crushes him at Yan (
鄢). The terse title uses every word to criticize:
克 ('defeat,' normally for enemy states, not kin) implies unkind brotherhood;
段 (bare personal name, no honorific) denigrates the loser;
郑伯 downgrades Zhuang's rank. The locus classicus of the Zuo Zhuan's
春秋笔法 ('Spring and Autumn Brushwork') of moral judgment through word-choice.