Hey, a thing that's been bugging me: You should introduce an autoreload for the weapons, because it's a bit annoying you have to press the reload key each time when you're out of ammo. You should make this an option because it happens often that you're stuck in battle without ammo before realizing you need to press the key. Good job on the interface, by the way (I mean the weapon and ammo indicators).
Another thing: It's not really clear for what you get promoted. For kills or for taking territory? You should add some instructions in a readme file wich is contained in the installation. My brother complained he got hardly promoted although he killed dozens of enemies.

I'm also having problems reading the map. What do those numbers in the different fields mean? Do they indicate the number of your own soldiers or of the enemies in those fields?
The map could be made clearer by adding frontlines, that change when you make progress, or by adding clearer indications of where your men are.

Another suggestion: Add an in game kill count. Would be cool if you could see how much enemies you have killed and how much you've died. You could also add additional indicators that count the deaths in the whole team (they don't need to be on screen the whole time, you could make them available through a key, like through the tab key in other shooters). Statistics at the end of each round, ability to save replays would also rock!