Was playing a hotseat game, checking out research and found some weird things:
1. At Assault level one I was only able to upgrade 3 units although I had a prompt for a fourth.
2. At Assault level two I was unable to upgrade any units, though I was down to 2 assault units and had a prompt to upgrade. Perhaps if all the level one assault units had been destroyed I would have been able to upgrade again.
3. At Tank level two, my level one tanks did not upgrade to level 2 like artillery, however, this is pretty minor as I figure by the time you get to level two the level one tanks will have been destroyed.
4. After the surrender of the UK I kept getting spammed with messages that "London has fallen to", and Plymouth, Southhampton, Scapa Flow and Halifax. Looks like this and is a real pain:
BTW... London didn't fall to anybody as it surrendered because I didn't manage its transports and it went hungry until it surrendered by itself.
5. Found out that gas is not cumulative. So at Gas level one, you have four shots. If you don't use them, at Gas level two, you have only four shots as well (not 8) but with a better gas. No surprise here as the gas types are different.
The result of this game gave me the statistics needed for all the upgrades (and some notes concerning some of the upgrades) which I will publish soon.
Ray (alias Lava)