Is “He slew Tadun, the chieftain of the Wuhuan, in battle.” true?
attested in history
Records of the Three Kingdoms, Book of Wei, Biography of Zhang Liao, records that when Cao Cao campaigned north against the Wuhuan, Zhang Liao urged an immediate attack and led the vanguard to rout the enemy, killing Tadun in the melee.
Zhang Liao
In official history, he was hailed as the 'Tiger of the East' and the foremost of Wei's Five Elite Generals, famed for his valor at Xiaoyao Ford.