Related Rule
Botswana
Practice Relating to Rule 158. Prosecution of War Crimes
Botswana’s Geneva Conventions Act (1970) provides:
(1) Any person, whatever his nationality, who, whether in or outside Botswana, commits, or aids, abets or procures the commission by any other person of, any such grave breach of any of the scheduled conventions as is referred to in the following articles respectively of those conventions, that is to say [Article 50 of the 1949 Geneva Convention I, Article 51 of the 1949 Geneva Convention II, Article 130 of the 1949 Geneva Convention III, Article 147 of the 1949 Geneva Convention IV] shall be guilty of an offence and [be punished].
(2) In the case of an offence under this section [i.e. a grave breach in the meaning of Article 50 of the 1949 Geneva Convention I, Article 51 of the 1949 Geneva Convention II, Article 130 of the 1949 Geneva Convention and Article 147 of the 1949 Geneva Convention IV] committed outside Botswana, a person may be proceeded against, indicted, tried and punished therefor in any place in Botswana as if the offence had been committed in that place. 
Botswana, Geneva Conventions Act, 1970, Section 3(1) and (2).