There is money.
No there isn't. There are fuel supplies, ammo suplies and manpower. I don't know a great deal about leading an army in Real Life but I imagine that you need that kind of stuff to stage an assault.
This is an attempt to recreate the combat strategies used in WW2. Not some plotless game following plotless combat between red and blue robots.
Real wars need fuel, ammo, manpower and whats that real important one...erm...oh yeah, MONEY!!!
You do need to build forward bases. Occupying a few houses won't do it. You need to have proper defences, medical stations, etc.
In short its the best and most authentic RTS to date. Z and C&C are nothing more than fantasy strategy games. (IMO, they're the ones that suck)