Lagole Gon
Arcane
For the record I don't understand what you mean by "each army you kill gets added to the total even if the banner stays green". There seems to be a max morale of 20 and a minimum of -100, so the problem is that I killed a lot of armies whilst at +20. In hindsight I should have saved many of the fights until my morale dropped, which IMO is retarded design. Morale would by sky high because a new commander showed up our of nowhere and started humiliating demon armies against the odds.
Killing armies doesn't add morale. Banners staying green add to morale per day.
Killing armies SHOULD turn banner green and add to the total number of days Victory Banner will stay green (but the number is invisible AFAIK).