Is it possible to update the outdated units after 1-2 years of combat? Example: at the start i fight with my Panzer I and in the mid of 1940 they have 2-3 combat upgrades. At this time i can build the new Panzer II (also a light tank). But it is not possible to upgrade this old and experience Panzer I unit! It is hopless outclass against any other tank, so in war you pull your unit back to homeland and give them new equipment :)