Laboratory

Building Description
"Better units ensure more powerful attacks! Upgrades your units here!"

- In-game description

Tips:


 * Although it doesn't actually seem to do much at first, maybe upgrading units from damage 50 to 55 points, upgrading a few times can give some very satisfactory results.
 * Be careful when you level up your units, because their training costs will increase more and more and could unbalance your economy a little, if you are the kind of player that attack very often.