Mission building resources

[Marabekm]

Hello all.
I am interesting in building missions and looking for some resources to do so.
USAAF, RAF, and Luftwaffe seem easy enough to find. Also was able to locate info on Romanian Airforce, and little bits for RAAF and RNZAF. And have some good books for IJA/IJN.

But does anyone know any good resources for the Regia Aeronautica, Hungarian, Slovak, VVS, or Finland.

Also any info on major battles and campaigns fought for these countries as well.\, would be appreciated.

It was a big war and I wish to make at least one or two missions for all involved