rabbidrabbit,
Furball Island on OzKansas is a great ground war area with the early war plane set. Since the planes are Spit I & Vs; 109 E & F, Hurri I & II, F4F, JU-88, ect, there are no real GV killers that are carrying 2x1000 lbs bombs and 8 rockets. The early war planes are limited in their bomb capacity, and besides, you don't want to be flying around with bombs on your plane on Furball anyway. What you will see are a lot of JU-88 formations being used to bomb bases and occassionally dive bombing GVs. But for the most part, the GVs are engaged fully with other GVs.
The result is there is a raging ground war trying to capture and defend the bases, while a raging air war goes on overhead.