This suggestion would become more effective with systematical placement of Airfields, Vehicle hangars and depots, with minor adjustments to current GV spawn/Convoy resupply system.
Airfields will be placed about 25~30 miles away from each other, and they are connected by "fairways". In the middle of this "fairway" lies the truck Depot which currently in AH spawns truck convoys to towns for supplies.
As it can be seen in the attached picture, fields will thus, have multiple truck Depots which are linked with the airfields. These truck depots will also function as small VH bases. Two hostile airfields when a new game begins, will not be linked by roads in such manner. Only the fields within the territory are linked by roads.
Thus, a strategically "important" airfield which gives access to many other areas, will be logically, linked with multiple airfields nearby by roads, and since in the middle of each road lies a truck Depot, it would also mean the strategically important fields will receive more resupplies from multiple truck depots nearby. In comparison, less important fields in backward areas or in the far edge of a country's territory will have less number of roads linked to other fields, typically only one road, and this would mean these fields would be less in resupply rates compared to "important" fields.
A large, important airfield smack in the middle of the territory may be linked with 3~4 nearby airfields. This means it has 3~4 truck depots linked to it, and when the town is damaged, town supplies by truck will come in 3~4 different directions. Thus, not only suppressing and vulching airplanes at a field is important, but also maintaining sufficient number of planes devoted to interdiction will also become important when a certain side decides to go for a capture against an important, large base! If you are careless about stopping resupplies(if 4 roads are linked, there will be 36 trucks inbound the town!!), then the town will quickly re-up. Sorry, no capture for you!
In the case of a small, unimportant field, it may be linked with only one airfield nearby.. only 1 truck depot heading to town, and thus, only one set(9 trucks) of convoys coming in for resupplies.
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The truck depots can be destroyed, but as it is now, destroying it will not stop resupply trucks from upping. It will only take away the VH function of the truck depot.
When a certain side tries to capture an enemy airfield by ground forces, this is what will happen:
As I mentioned, the fields with "borders" in between them will not be effected, as they are not linked. But once a certain side secures an airfield within an enemy territory.....
1) The VH will spawn vehicles only so far as the truck depot.
2) So long as the depot stays in enemy hands, the truck convoys will not spawn resupplies to our town.
3) But as you can see by the layout of the road, if capturing the truck depot might prove to difficult, you can always just initiate a blockade, so the trucks spawning to the linked enemy field can be destroyed. Ground battles will not just be about the "charge to town!" aspect, but also other important situations as blockades!
4) If the truck depot is captured, it will no longer spawn convoys to lonked enemy field, but only to your field.
5) Once the depot is captured, vehicles can spawn from the depot to right outside enemy base area(circled in yellow)
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Look at the picture. There are two airfields at the bottom, and one at the top side. If one side captures the two, bottom fields, and initiates a GV blockade against the truck depots, the top field will be isolated. Thus, more important tactical/strategical decisions and situations will rise. The isolated field will have no resupplies to town of enemy initiates blockade. They will have to launch their own GVs or planes to lift the blockade.
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The three terrain types I have metioned in the previous post also plays an important role. When GVs spawn, they will spawn on a road. Following the road to their target will be the fastest and most effective, but interdicting enemy planes will be on the lookout. Once the GVs meet enemy GVs, they will spread out into battle formations - staying in a single line in the road is not very effective at GV battles

The tanks and heavy flaks will scatter into battle position. Troop carriers like M3s will probably head for the forest for cover. Enemies will also have to consider placing some GVs inside the forest to stop M3s from sneaking by.... Or, who knows? Enemy GVs might wait inside the forests by the roads... as our GVs pass by, they will come out in full might of the ambush. Or.. our GVs can initiate a hidden blockade outside the truck depot.. anything that comes nearby will be attacked. Some enemy GVs might spawn from the truck depot, others from nearby fields, and they may attempt to break the blockade.
I am pretty confident this idea and field layout will bring out a lot of interesting situations which will increase both immersion and fun. GVs and ground warfare might play more important role in the overall aspect of the war, and who knows, there may be even dedicated GV groups or squadrons, since the environment will be suitable enough for delicate tactical/strategical GV fights, instead of the "one-way-ticket" sort of GV warfare we have right now. "The Rommels".. or maybe "Montgomerys?"
