I would like to echo the concerns/points posted by Wooserloop and Apuuli.
Advancing in this game is almost impossible. The map I attempted to play on is dominated and controlled by a developer alliance, ADDICTED. Whenever our alliance attempted to take a new neutral base it felt like they allowed us to get it and start building it up, only to come in such immense force at steal it. I feel stupid for spending money attempting to retain bases, this approach is as pointless as trying to build up for free, which would take forever and be so tedious.
Take my advice, find a different game to play that has achievable goals and only requires you to spend money if you want to tweak and enhance.
Hope these posts help people to see through the cynical way this game has been developed. They have spent the bare minimum of time on any help or instructions and are simply in it for a quick buck.