Name a scenario where either side can conquer the other
Well, in the past Germany was conquered by the Allies, same for Japan and Italy.
I would suppose if India/US/Canada and some of Europe (mainly UN I suppose) combined a force to fight China, China would eventually lose, I mean, size only has so much to do, and now a days when technology is the key, I doubt anyone could match a force the US could pull together with its alliances/connections.
I am not saying we can, or cannot, I am simply saying a war could have a positive affect if it played out a victory that changed the nation.
It would involve tens of millions of deaths. The US doesn't have the stomach for it. China also has nukes
US can't be invaded
We're being invaded now or havn't you noticed the 20 million plus illegals in the country? Look up La Raza and their plans for California and all the other regions they claim we stole from Mexico.