Hi guys, when you buy troops they are specific to that actual battle, its not even a Europe/N.America thing, they are bought within that particular battle as the price of troops may vary from battle to battle and we don't want things like large troop bonuses earned in one battle allowing you to dominate loads of others.

Ever troops purchased or gotten through a battle is born into a specific battle and dies when that battle ends.

Sorry for the loss mate, when there's a lot of new stuff going on we appricate its not always clear for you guys to know absoutely everything (especially during beta when things are changing) and we don't always thing of every question to answer and warn about in advance, but we're working on getting there! :)
FBG Admin