Kanil: The only problem with that is that the beginning is going to be even more boring than it already is if you choose something other than the major powers to play as. I tried playing as Luxemberg the first time and it was completely retarded. You can't do ANYTHING. You can't fight anything, can't build enough, can't research enough, etc. Then I tried Ireland. Again, same problem.
It's not like, "oh hey, here's a small country but if you work at it, you can definitely be able to rule the world!" Because, as a simple product of math: Ireland gets around 20 IC at the start of the game. Germany gets about 400. Ireland gets about 3 leadership points. Germany gets 50. Germany also happens to have 1/6th of all existing technology researched already while Ireland has one or two. Germany also has a standing navy, airforce, and army which includes many divisions of men, battleships, battlecruisers, fighters, tac bombers, etc. Ireland has a two infantry and a transport. All the major powers start with more or less the same. Explain to me please, through what feasible mathemathical function, we can get Ireland anywhere NEAR the major power's levels before the game ends?
Maybe it's different in the other Hearts of Iron games, as I've never played them, but it's more or less impossible in this game without a crushing amount of patience.
And yeah, the US is definitely way stronger than Germany.