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Republic of Korea
Practice Relating to Rule 64. Conclusion of an Agreement to Suspend Combat with the Intention of Attacking by Surprise the Adversary Relying on It
Under the Republic of Korea’s Military Regulation 187 (1991), acts committed in violation of the terms of a capitulation agreement constitute a war crime. 
Republic of Korea, Military Regulation 187, 1 January 1991, Article 4.2.