How could the United States, France, and the Netherlands justify joining a war with Japan when domestic politics resisted mass troop commitments?
Short answerThe case is easier if the war is presented as a limited naval campaign using fleets, cruisers, submarines, and blockade support, with no mass land armies required at the outset.
NotesPublic resistance to mass land war did not rule out a smaller naval commitment. The League of Nations, French and Dutch imperial exposure, British naval protection, and existing American anger over Japanese incidents all made coalition participation plausible. French heavy units, Dutch cruisers and submarines, and U.S. Pacific Fleet support would strengthen a blockade. These deployments could begin without a total-war invasion campaign.