I never really had this interpretation of Shin and co. but it's an interesting take. But the reluctance of war is why they keep fighting to fullfil the dream of unification, which will end all war for good.
Like I said, read 798 and 799. Riboku offers a perspective that kinda touches upon his...
The ranks ultimately don’t matter, it’s the feats that should be accounted.
And he has killed enemies that are not only stronger than Bihei, but also higher rank.
For example, this which happened before the assassin arc
He is a general^
That Shin that fought the assassins got even stronger after the first arc. But it’s clear even from the first arc that regular soldiers are fodder are to him
After speculating the rest of the roster I've realized there is actually room for OG DB and GT (not everyone will make it but most of them can). Z Movies I'm certain will be future payed content.