The whole game is pretty much battling. It is just Battle Battle Battle.
Though, some of the battles are played under specific rules, e.g preset teams, or this one with a wheel that spins and you have to select your pokemon by chance =/
The good things are the items you can buy using BP you earn. These items can be transferred to D/P.
10 - Supply Depot (1)
13 - Barracks
15 - Marine (1)
16 - Orbital Command + Supply Depot (2)
16 @100% Marine (1) - Command Center (2)
21 - Bunker (1) + Barracks (2) (3)