I doubt that frontline was at airfields..
Somewhere between those and enemies must have been a division of tanks
Sorry... I did not mean to sound, well like I did.

I am very interested in this as well, but under the current game it is very hard to define the "Front" or "Forward Line of Troops (FLOT)", because there really isn't one. Basically there are only "Borders".
To have a true FLOT I believe the game itself must define it. The FLOT would have to be based upon the borders that are dymanic in the current game.
Once you define the FLOT you could then have temporary vehicle bases placed along it. The game itself would have to do this. These bases would be dynamic in nature and use an algorithym within the game. This algorithym would place these temporary vehicle bases in respect to permanent bases in the area.
These temporary vehicle bases would be close to the FLOT, say 5 miles or less. They would be destroyable, meaning once they are destroyed nothing respawns there any more. There would not be much at these bases, maybe one structure. The base itself would not show up on NME maps, only allied maps.
Lets keep this going, maybe we can come up with a workable solution.

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Mino
The Wrecking Crew