It is possible to remove all units from an army with a hero by garrisoning them, though it is impossible to remove all of them by splitting armies. I think that it was intended, that hero can't go solo, but because there is a chance that everyone but hero can die, the ability for hero to go solo had to be implemented. And while full army split was banned, the garrisoning was forgotten about.



But here what I want to say. Why ban hero-only armies? Maybe it's better to allow full army split. I mean why hero can't go solo? I don't think there is gonna be some kind of problem with that. Maybe I am missing something or maybe this is not a bug, and all this was made intentionally, but if not, please fix it by allowing full armie split.