You're right, let me rephrase that. The US is the only NATO country with living experience in invading non-neighboring countries with current methods, doctrines and technologies. That's not a simple thing to do and that know-how is extremely valuable if you want to invade someone else.

methods aside. Tiny UK is pretty impressive actually when you think about it, they "united" so many countries all over the globe across the ocean. If only they have treated the people better.