Introduction -- The application of international humanitarian norms to internal conflict prior to the Geneva Conventions of 1949 -- Article 3 common to the four Geneva Conventions of 1949 and the threshold of non-international armed conflict in international humanitarian law -- Changes in the scope of non-international armed conflict resulting from the Additional Protocols of 1977 -- The threshold of non-international armed conflict -- The concept of non-international armed conflict in the Rome Statute of the International Criminal Court -- Conclusion.
