An idea that we have been developing for a future TL. What if France (and A-H, but I guess that France would be the main divergence factor here) takes the side of Spain in the Spanish-American War ? ITTL France, Spain, and A-H have been the Entente, whileas Germany, Russia, and Italy the Alliance. Britain is (still) neutral, but coming closer and closer to the Entente (which it shall enter in the near future).
How would French intervention change the war ?
Also assume the Alliance countries give strong support to the USA (naval demonstrations, they send sizable "volunteer" expeditionary corps to fight for the USA), but do not enter the war directly. How much this would counter the French ?
How much this would make the USA hostile to the Entente, and friendly to the Alliance, in the future ? Would this help justify the USA entering WWI for the Alliance ?