Related Rule
Germany
Practice Related to Rule 95. Forced Labour
Germany’s Military Manual (1992) states that “compelling prisoners of war and civilians to serve in the forces of the adversary” is a grave breach of IHL. 
Germany, Humanitarian Law in Armed Conflicts – Manual, DSK VV207320067, edited by The Federal Ministry of Defence of the Federal Republic of Germany, VR II 3, August 1992, English translation of ZDv 15/2, Humanitäres Völkerrecht in bewaffneten Konflikten – Handbuch, August 1992, § 1209.
Germany’s Law Introducing the International Crimes Code (2002) provides for the punishment of anyone who, in connection with an international armed conflict “compels a protected person … by force or threat of appreciable harm to serve in the forces of a hostile power, [or] compels a national of the adverse party by force or threat of appreciable harm to take part in the operations of war directed against his or her own country”. 
Germany, Law Introducing the International Crimes Code, 2002, Article 1, § 8(3)(3)–(4).