兵不厌诈
English Expression:
  1. n.  all is fair in war
  2. n.  nothing is too deceitful in warcraft
  3. n.  there can never be too much deception in war
  4. n.  in war nothing is too deceitful
  5. n.  all's fair in war
French Expression:
  1. adj.  Jamais les ruses ne sont de trop dans la guerre