Which nations will be allied with America against China when war breaks out in the Pacific?

i believe that America's war is only around the corner. This is the war that they have been saving for since WW2. We have had two European was recently now I certainly believe that America's world war is just around the corner. As before WW1 Germany was challenging Britain's dominance as the World number one. This involved buying British foreign debt and overtaking Britain as the largest exported in the World. ironically over the years building up to this point China has done exactly the same as the Germans did to Britain before WW1. now which nations will be with the US and which will be with China?