Only the army is reset. Buildings on the overview map or your progress in the existing battles are not affected.
The squads don't have troops amount anymore, and use a "normal" health number now. That's why that number was reset and changed.
Okay thanks :)
When i look new feature there is an option my commander can ride Unicorn. Is that mean my commander still virgin? Because Unicorn hate non virgin. Only virgin can tame unicorn hehe..
Or maybe you can add Bicorn for non virgin user if you interested to make CG scene with commander in future update :D