International humanitarian law (the laws of war) obliges warring parties to distinguish between combatants and civilians (the principle of distinction) and, when attacking legitimate military targets, to ensure that the military advantage gained in the attack outweighs any possible harm caused to civilians.

Hezbollah launched cluster attacks that were at best indiscriminate, i.e., they violated the principle of distinction by using unguided and highly inaccurate cluster munition models against populated areas. At worst, Hezbollah deliberately attacked civilian areas with these weapons.