WHAT WOULD IT LOOK LIKE? God forbid this would actually happen, but recent events and past histories are leading to a massive conflict between the US and China in the coming years, with other countries forced to pick sides. China may have an initial tech advantage while the US would have an advantage in alliances and geography. It may ultimately become a war of attrition, and similar to the ways in which the Allies outproduced and outlasted Germany/Japan in WW II. Complacencies and divisions sown in the West (by our adversaries?) will make it difficult for us to catch up to such a conflict.