Heres a good example of what a GDI base will look like once you begin. This player has a few harvesters spread across his mineral fields with a few buildings to boost production of Tiberium, Crystals, and Energy.
Heres a look at a GDI base where the player has had more time to develop. You can see that hes now mining all his resources very efficiently, which will help him build up his attacking and defending armies more quickly. More advanced building types will provide more options for both offensive and defensive units as you level them up.
Soon, it'll be time to start thinking about expanding further and starting a second base to ramp up production for your war efforts.
This is your army tab. Here, we see a well-rounded army with nice mix of infantry, ground vehicles, and air forces. Youll need to be a little patient and make it past the early stages of the game to be able to afford an army like this.
Before combat begins, youll be able to look at how your enemy has set up their defenses and buildings at their base (for both NPC and real players). Once you click to begin your attack, your army will march forward. Any units that make it past the defenders line of defense will begin damaging the bases buildings.