Hague Conventions of 1899

Convention (II) with Respect to the Laws and Customs of War on Land and its annex: Regulations concerning the Laws and Customs of War on Land. The Hague, 29 July 1899.

Regulations: Art. 23. Besides the prohibitions provided by special Conventions, it is especially prohibited
(e) To employ arms, projectiles, or material of a nature to cause superfluous injury;

Regulations: Art. 25. The attack or bombardment of towns, villages, habitations or buildings which are not defended, is prohibited.