Article 1 Code of Crimes against International Law (CCAIL)
Part 2 Crimes against International Law
Chapter 2 War crimes
Section 8 War crimes against persons
(3) Whoever in connection with an international armed conflict,
3. compels a protected person within the meaning of subsection (6), number 1, by force or threat of appreciable harm to serve in the forces of a hostile Power,
shall be punished with imprisonment for not less than two years.
Compelling a prisoner of war to serve in the forces of a hostile power - IAC
Compelling a protected person to serve in the forces of a hostile power - IAC
EDIT.