My World War Three plans call for the annexation of Canada and Mexico, including a huge industrial build-up in Mexico. This will solve border issues, and give Mexico lots of jobs building guns and tanks that will be necessary for the invasion of Asia. Canada can share up in the industrial build-up too, since armored columns will cross the Bering Strait, sweep through Siberia and Mongolia, and invade China from the north . It doesn't make any sense, so the Chinese will
a) Rush to defend Northern China from our armies. Halfway through the migration of supplies, invisible B-3 bombers will destroy the transportation infrastructure, stranding their forces in the middle of the country, where we can surround them and destroy them.
b) Think that it is a decoy and leave their forces in the South, allowing us to take Northern China. By the time they realize that it isn't a decoy, the northern forces will have too much territory to be pushed back, and the Chinese will be crushed between the northern army and an attack from out of Thailand, leaving us free to attack India from the east.
Of course, if the guys up top know what they're doing, we've already effectively annexed north america and began the industrial buildup. Then the US govt will start buying up tons of oil and stockpiling it, getting the price up very high and getting the Arabs to start producing at peak capacity, then carpet bomb the oil fields while simultamously switching to North American oil. If it goes well, we won't even need to invade them: they'll surrender, their tank columns sitting helpless and out of gas. If they don't surrender, at least they'll have a World War One kind of army, which our tanks and machine guns should crush. Of course, setting up puppet governments in those countries will be easier if the puppeteer doesn't have the blood of a billion Eastern soldiers on his hands, so hopefully we can win without firing a shot.
Of course, this could all be speculation, but why wait for them to take action against us and force us to fight on their terms when we can take action now and win.