13 points
I mean really the existence of war crimes relies on the existence of treaties between the nations defining what those crimes are. Gonna guess the Fire Nation was not a signatory.
10 points
The Nazis weren’t signatories to the Nuremberg charter, yet they were judged by it. So there is precedent for judging war crimes without pre-existing law.
4 points
I’m also not exactly sure how international law works in a world that only has fourthree countries.
2 points