War Commander is a massive game, with tons of unit types and upgrade options. There's a lot to learn, and it can be a little intimidating at first. But have no fear: your fellow players have you covered! You can find a tremendous amount of information about how the game works at this excellent player-maintained wiki. While customer support is happy to answer your questions about basic gameplay, check out that wiki; you'll find your answer faster that way, since you won't have to wait on us, and you'll probably learn a few more useful facts during your research!
Remember, though, this is a player-maintained wiki. It is unaffiliated with KIXEYE.com, and is built and maintained by players. KIXEYE is not responsible for any erroneous information contained therein. That said, this wiki is a solid resource...one many of us in customer support use ourselves!