nevertheless, there has never been a case, so far, where all master ranks engaged in all-out war.
the reason for that is... because there are 13 master ranks.
suppose a world war breaks out, and master ranks struggle on behalf of the super powers.
and... that would most likely result in a 6-on-6 division of master ranks.
and so it would become pretty much a stalemate of combat power. conflict could begin just from rivalry alone.
so it is the reason such conflict absolutely will not happen...!