Geir Ulfstein has written an introduction to international law before and during war for the Norwegian Institute of International Affairs (NUPI) website Hvor hender det?. The website provides an introduction to foreign policy topics for students, teachers and anyone else with an interest in international politics. Issues that Ulfstein discusses in the paper include:
- When does international law allow for the use of force?
- Who decides what constitutes legal use of force?
- Is everything allowed in a war situation?
- How do new non-state actors challenge international law?
You can read the full paper (in Norwegian) here (pdf).