兵行诡道
      Explanation: Soldiers: military forces; Line: use; deception: fraud; Road: method. Military forces can use the strange and the pseudo-fraud tactics.
      Usage: The main predicate; for clause; means the use of deception to war
      Source: Qin Sun Tzu "Sun Tzu count": "Soldiers who deception also."
  • Thesaurus:  all is fair in war, arms Not mind doing sth authority