Summary The tactics of war have profound impacts on tropical forest ecosystems, and modern weapons technologies have greatly increased their destructive potential. Some legal protection is afforded by customary international law, and the international community responded to the Vietnam War by adopting, inter alia, the 1977 Additional Protocol I to the Geneva Conventions and the 1976 Environmental Modification Convention, which prohibit “long-term” (or “long-lasting”), “widespread,” and “severe” environmental damage. Nevertheless, many regard these and other existing conventions as inadequate, especially as applied to internal conflicts. More recently, the International Union for the Conservation of Nature-World Conservation Union (IUCN) put forth a Draft Convention on the Prohibition of Hostile Military Activities in Internationally Protected Areas. This paper analyzes the IUCN Draft Convention-particularly issues of prior designation of protected areas, waiver of protection, and monitoring and enforcemen...