start an undeclared war
Contents
Undeclared war
  Riddle: Sudden attack
bù xuān ér zhàn
  Means not declare war, attack suddenly
Translated by Google
No. 3
  That do not declare war, on a sudden attack.
Translated by Google
English Expression
  1. n.:  start an undeclared war,  open hostilities without declaring war
Thesaurus
bounce
Antonym
After the real harbinger, execute the criminal first and report to the emperor afterwards— act first and report afterwards, Xianzhanhouwen, take strong measures only after courteous ones fail
Containing Phrases
Huang Taiji start an undeclared war