First of all, nice game engine.
Unfortunately the scenarios and map need alot of work. So far I've only looked at the 1939 scenario. To be honest the setup seems rather arbitrary and almost as if the creator had little knowledge of WWII.
*Slovakia was not a country (delete it and merge the country with Germany. Arguments about the puppet regime are not valid and especially for game purposes better to remove it).
*Persia, Saudia Arabia and Iraq were not "countries" in this period, rather they were controlled by the British Empire. (Delete them, add the territories to the UK).
*Iceland was not an independent country, but part of Denmark. For WWII purposes, it can be part of the UK or the US if one prefers.
*Sub on sub warfare should be removed
*BBs should not fire on subs
(Do subs even serve a purpose, it seems impossible to run any sort of U-boat campaign)
*Ports! They are missing, and everywhere. This hinders amhibious assaults, supplies, etc. Add the following (at least): Trodnheim, Bergen, Harwich, Dover, Malta, Liverpool, Hull, Scapa Flow, Dunkirk, Cherbourg, Bizerte, Oran, Casablanca, Heraklion, Malta, Taranto(!), Malmo, Sundsvall, Cadiz, Palma. I'm sure there are several I missed.
*Add city: Kiruna (Iron Ore came from here, not middle Norway).
*Rename: Tarabulus -> Tripoli. And a whole lot of others.
I could add a whole lot more, but unless/until we get documentation on how to edit scenarios I'll halt there. Looking forward to the patch.