U.S.A. vs The World. no nukes

[John Dibble]

Depends on a few things.

First off, let's assume there's no Pearl Harbor type situation in which one side strikes the other first. A declaration of war is made and both sides mobilize their forces.

What happens in the first few days will be important. The US will likely be able to mobilize its forces fastest. We'd most likely take down the governments of Canada and Mexico rather quickly and occupy the areas - it's likely they would surrender at this point. Cuba would likely be hit by our missiles, and they would either surrender or their government would be thrown into chaos rendering them ineffective for a while at least. Any other Carribean powers would be similarly dealt with.

Provided the air forces of the Eurasian nations were repelled by our defenses, this is where things get complicated. The other nations of the world would have difficulty getting onto our soil (except perhaps to Alaska) in order wage a ground campaign. Our navy should be able to hold off the navies of the other nations. Who wins after this will be determined largely by how decisively the US manages to strike at other nations within the first few months, and how well the world coalition works together. Many nations might not work well together, and many don't have sufficient offensive capacity to pose an immediate threat. So if the US manages to force enough nations to surrender quickly, they could potentially win, but if they are allowed enough time to organize then the US wouldn't win the inevitable war of attrition.