For the 16 examples given, being a neighbor or in close physical proximity makes it much easier to start a war. Who would invade who, in the case of USA vs. Ch

For the 16 examples given, being a neighbor or in close physical proximity makes it much easier to start a war. Who would invade who, in the case of USA vs. China? Or will they just fire missiles at each other? Or will it only be a proxy fight in a third location, like Taiwan?