What happens if the United States joins France and Russia against Britain, Germany, Italy, and Austria-Hungary?
Short answerAmerica faces a grinding war in which its fleet cannot simultaneously protect the Atlantic coast and the Philippines from the Royal Navy and Japan.
NotesThe United States might attempt to break the blockade and invade Canada, but the wider war depends on how quickly France and Russia are defeated. Japan could attack the Philippines and other American territories while the Royal Navy threatened the US coast. The American fleet would then have to choose between two distant theaters because French and Russian naval help could not match the opposing coalition. Alliance arithmetic becomes a problem of naval concentration and geographic overextension.