Comment Re:Already Lost (Score 1) 353
The really decisive fighter of WWII was the American P51 Mustang
Well that all depends on your timeframe. Later on, perhaps, but at the Battle of Britain, the UK stood alone and was in immediate danger of being invaded. If that had happened it would likely have fallen as the UK didn't have the war industry at that time to defend on land. The technical superiority of the Spitfire (& to some extent Hurricane, not as good a plane but in far greater numbers) at that point in time saved the UK from invasion since air superiority couldn't be achieved.
I think "preventing invasion" could be described as fairly decisive...