The following are samples of articles outlined in the Four Geneva Conventions of 1949 and two additional Protocols of 1977.
Protocol I, Art. 54 - Protection of objects indispensable to the survival of the civilian population
"It is prohibited to attack, destroy, remove, or render useless object indispensable to the survival of the civilian population, such as food-stuffs, agricultural areas for the production of food-stuffs, crops, livestock, drinking water installations and supplies and irrigation works, for the specific purpose of denying them for their sustenance value to the civilian population or to the adverse Party, whatever the motive, whether in order to starve out civilians, to cause them to move away, or for any other motive."
"... in no event shall actions against these objects be taken which may be expected to leave the civilian population with such inadequate food or water as to cause its starvation or force its movement."
Protocol II, Art. 17 - Prohibition of forced movement of civilians
"The displacement of the civilian population shall not be ordered for reasons related to the conflict unless the security of the civilians involved or imperative military reasons so demand. Should such displacements have to be carried out, all possible measures shall be taken in order that the civilian population may be received under satisfactory conditions of shelter, hygiene, health, safety and nutrition."
"Civilians shall not be compelled to leave their own territory for reasons connected with the conflict."
Protocol I, Art. 57 sec. 2 - Precautions in attack
"In the conduct of military operations, constant care shall be taken to spare the civilian population, civilians and civilian objects."
"an attack shall be cancelled or suspended if it becomes apparent that the objective is not a military one or is subject to special protection or that the attack may be expected to cause incidental loss of civilian life, injury to civilians, damage to civilian objects"
With the laws outlined in such works as the above established and the daily violation of such agreements by High Contracting Parties; what is progress through deception but the recurrence of history as lesson.