While you are right that no nation could ever invade the US, we could quite capably invade China. We would first establish complete dominance over all seas (Yellow, East China, Japan, etc) and could lauch massive bombing campaigns from both Japan, South Korea, and Taiwan to destroy all means of supply into China. With little regard for innocent life, we could break the will of the Chinese leadership, its military, and its people by wreaking total destruction on the infrastructure of their cities of Shanghai and Beijing. China's border would not be defendable up and down the entire coast, and we could establish a ground presence on mainland China of 100+ divisions (a draft would be necessary).

Furthermore, once we started our propaganda campaign, droves of Chinese people, whose computers currently disable any succession of letters that form "Capitalism," or "freedom", among others, they will accept us as liberators. [img]/images/graemlins/grin.gif[/img]

Ok maybe that's far fetched, but one thing is for certain, they don't have a religious doctrine that bars foreign infidels from stepping foot on their holy soil, so a freedom/capitalism/porn based propaganda campaign could possibly work miracles.