Try to defeat the enemies by sending hordes of clones at them. Your aim is to conquer all hostile barracks. You're a part of the blue team, and the enemies' teams are green or red. The grey barracks are neutral territory, so you don't have to expect any attack from that side. The more barracks you conquer and the bigger they are, the more you can upgrade your army units. You can also conquer more barracks at once, by dragging your mouse cursor. Do your best and reconquer the territory you lost years ago!
Mouse - Deploy. Spacebar - Select / Deselect Units. CTRL - Add / Remove Units.