So, after playing a lot of WitW scenarios in the past couple years, I decided to really take the campaign game plunge vs. the AI. I'm in late September of '43, and so far, I am doing OK. The Italians are still fighting, even though they got invaded a couple weeks ago
One of the things I did was decide that I needed a satellite air HQ to protect all those vital oil/fuel facilities down near Ploesti. So I railed Jagd Corps I down there to let Luftflotte Reich concentrate on the air war in Germany. I also set up about 200 planes of varying nationalities in the airfields around Ploesti.
The setup of this was fine. I introduced smaller units into the airfields that weren't first occupied/operational down there. Then I added larger units once supplies and support squads started attaching themselves to the newly occupied airfields. I checked all the airfields to make sure they have a good supply priority setting. I checked the Bucharest depot to make sure it has a relatively high priority setting (2, in this case). I looked right before posting this and the Bucharest depot has over 12K each of fuel and supplies. And I have the Jagd Corps I HQ sitting in Bucharest. I even changed the HQ on the local German AA units to Jagd Corps I.
However, I am seeing the air units in the Ploesti area starting to decay. I switched out the local veteran German ME-109 gruppe to FW-190s a couple turns ago, and now it is down to 35 planes. Other local squadrons are the same, showing the dreaded "8 planes operational, 4 damaged/in reserve". This would be fine, except that the Allies haven't set up their airfields in Italy yet and I don't think the wings of an Allied plane have darkened the skies of Yugoslavia yet, much less gone near Romania.
So is the issue that a Jagd Corps can only supply something like 150 planes, maybe 200? The supply situation at the airfields should be fine. I just checked the airfields, and a couple of them have about 80% of the aviation support squads they should have, but most of them are fine. And fuel, general supply, regular support squads, ammo--all that is where it should be or a little higher than needed. Even the Ploesti airfield, where that gruppe of FW-190s seems to be decaying, is not only fine for all the supplies, but has MORE aviation support squads than required.