(although some treaties are from post war time it was defined at the Nuremberg tyrials that those rules derive from the laws of humanity and are uniquely applicable even for ex post judgements.
A judge should also respect the rules he's holding court about or those Nûrnberg "trials" end in not only having been a show but also a bad comedy.
Draft Convention for the Protection of Civilian Populations Against New Engines of War. Amsterdam, 1938.
ATTACK OR BOMBARDMENT OF UNDEFENDED TOWNS
Art. 2. The bombardment by whatever means of towns, ports, villages or buildings which are undefended is prohibited in all circumstances. A town, port, village or isolated building shall be considered undefended provided that not only (a) no combatant troops, but also (b) no military, naval or air establishment, or barracks, arsenal, munition stores or factories, aerodromes or aeroplane workshops or ships of war, naval dockyards, forts, or fortifications for defensive or offensive purposes, or entrenchments (in this Convention referred to as "belligerent establishments") exist within its boundaries or within a radius of "x" kilometres from such boundaries.
BOMBARDMENT OF DEFENDED TOWNS
Art. 3. The bombardment by whatever means of towns, ports, villages or buildings which are defended is prohibited at any time (whether at night or day) when objects of military character cannot be clearly recognized.
Art. 4. Aerial bombardment for the purpose of terrorising the civilian population is expressly prohibited.
Treaty on the Protection of Artistic and Scientific Institutions and Historic Monuments (Roerich Pact). Washington, 15 april 1935.
Article 1. The historic monuments, museums, scientific, artistic, educational and cultural institutions shall be considered as neutral and as such respected and protected by belligerents.
The same respect and protection shall be due to the personnel of the institutions mentioned above.
The same respect and protection shall be accorded to the historic monuments, museums, scientific, artistic, educational and cultural institutions in time of peace as well as in war.
(Dresden was an artwork of inestimable value)
Convention (II) for the Amelioration of the Condition of Wounded, Sick and Shipwrecked Members of Armed Forces at Sea. Geneva, 12 August 1949.
Art.3. In the case of armed conflict not of an international character occurring in the territory of one of the High Contracting Parties, each Party to the conflict shall be bound to apply, as a minimum, the following provisions:
(1) Persons taking no active part in the hostilities, including members of armed forces who have laid down their arms and those placed hors de combat by sickness, wounds, detention, or any other cause, shall in all circumstances be treated humanely, without any adverse distinction founded on race, colour, religion or faith, sex, birth or wealth, or any other similar criteria.
(2) The wounded and sick shall be collected and cared for.
An impartial humanitarian body, such as the International Committee of the Red Cross, may offer its services to the Parties to the conflict.
Also, please explain to me why
- bombing Dresden is a crime, but bombing another German city a week later isn't
- bombing Dresden is a crime, but dropping V-2 on London civilians isn't
- bombing Drenden is a crime, but bombing Coventry or Chungking isn't
I cannot explain the hypothesis above. Of course those were all crimes. Ask somebody who thinks the way you do.