Related Rule
Practice Relating to Rule 70. Weapons of a Nature to Cause Superfluous Injury or Unnecessary Suffering
Hungary’s Military Manual (1992) includes, as a “basic rule”, the obligation to “avoid unnecessary suffering, excessive damage and the use of more force than required to overpower the enemy”. It also considers as a prohibited method of warfare the “use of means and methods of combat resulting in unnecessary suffering”. 
Hungary, A Hadijog, Jegyzet a Katonai, Föiskolák Hallgatói Részére, Magyar Honvédség Szolnoki Repülötiszti Föiskola, 1992, pp. 59 and 64.