驪姬之亂

Li Ji Rebellion in 657-651 BC, where concubine Li Ji tried to throne her son but was eventually defeated by Duke Wen of Jin 晉文公|晋文公[Jin4 Wen2 gong1]

black horse / jet steed / good horse / legendary black dragon

surname Ji / family name of the Zhou Dynasty 周代[Zhou1 dai4] (1046-256 BC)

woman / concubine / female entertainer (archaic)

(possessive particle, literary equivalent of 的[de5]) / him / her / it

in confusion or disorder / in a confused state of mind / disorder / upheaval / riot / illicit sexual relations / to throw into disorder / to mix up / indiscriminate / random / arbitrary