Most of Indonesians also cannot name 4 countries that once occupied them. They can only name The Netherlands, Japan (some even asked for this), but not Portugal and Great Britain (temporary, which gave us that big flower name and our first national park, the most productive occupier ever).
I did this
http://www.sporcle.com/games/g/states like a hundred times and answered completely, but then I felt kinda pointless. It is okay being non-knowledgeable, nobody will lit a fire on your pants if you don't know the difference between Panzer III and Panzer IV except Mudra for instance.
Also, everybody told me that every aircraft looked the same, Airbus A320 and Boeing 737-800 is too difficult to differentiate. Yeah, I can understand.