I dont really know about the Morale or valour upgrades, the valour is won in battle and i think this does not disapear or dilute if you retrain the unit - i think the unit always keep's what ever valour it has earned. But the morale is gained by morale boosting building's and i thought that they worked like the armour buildings and could also be trained. Hmmm dont really know . Is this right or have i got this wrong .