China is also filled with even more issues internally then any other country which stops them from pushing any further. If they were to side with Russia... then I would have some concern, but even then I would still have confidence in the Allies in defeating any opposition from Russia or China or both. As for North Korea pfffttt....., they are not even a second thought. China may have a large military and their weaponry is advancing, but look at their people. They still have too much strife and civil unrest to organize themselves into anything effective enough to take on the US. They would have to have other countries join the fight in order to win against the US. The US against China alone, I guarantee the US would win... it would be a tough fight but the US would still over take China. Now lets say the US and China's allies were to get involved.... It would be the US and EU (along with smaller nations such as Japan, Australia, Canada, some of Africa, and most of South America) against China, Russia, and maybe the Middle East. Allies and Axis again. The Allies are stronger, more technologically set, financially set and population wise combined out weigh the Axis countries. Not to mention, they Axis countries are disorganized and too focused on their own agendas to focus effectively against the Allies.