Each faction must create an animated film which involves a battle between a moe anthropomorphic version of their respected countries/factions. Other countries will vote for which of the factions have the best aforementioned film, and the one with the highest votes win (obviously).
As I can see, this has a pretty good amount of pros here.
This law will save a lot of lives. We will be able to make cute (or rather sexy) anthropomorphic versions of our own countries fight in any kind of ways, whether it'd be a beach volleyball or some badass RHG-themed fight. There will be something to be proud of especially if your country finally has its own official anime-themed mascot.
The cons? Overpopulation. War exists to control the population (not only disease, contraceptives or natural disasters) and if there's nothing to prevent the world from feeding too many people then we will not fit in this planet and resort to having 12 families live inside 130 m2s of land.
Also, this kind of warfare will not be as awesome as seeing the usual death and destruction that we all see in the old times that makes The Bourne Supremacy look like Dora The Explorer. In fact, we will stay underdeveloped without advanced military technology that rivals other countries. If explosion-proof APCs don't go reality, then we won't have explosion-proof Hummers or Koenigssegs. If unpoppable tires don't exist, then we will forever stick to having to pump gas into wheels for the rest of our lives. If we don't reach for dark-energy weapons, then the Gravity Gun in Half-Life 2 will never come true and we won't be able to cut off zombie heads by telekinetically grabbing a circular saw and instantly shooting it at them. Speaking of zombies, without biological weapons, we won't be able to reenact The Walking Dead and have excuses to murder people for baked beans without remorse or guilt.
Not to mention that there's still a certain population of the world that hates anime. There will be a huge clusterfuck of hate messages that will go against the fact that Japanese culture is starting to invade the world (according to conspiracy theorists). These kinds of self-righteous people just hate Japan (I'm talking to you, Korea) and their only explanations are WWII and the Sea of Japan, the latter which Russia and the rest of the world responded with having their give-a-shit buckets emptied.
So there you have it. The pros and cons of moe warfare. Hope you learned something today, I probably didn't add all of it yet. I have contracted a disease my mother has and right now we have the same medications.
See ya guys later