Do Italy and Japan still join Germany if France does not fall until 1941 or later?
Short answerItaly may stay out because Germany no longer looks certain to win quickly; Japan still calculates its options but faces a less distracted Royal Navy.
NotesIf Germany remains tied down on the Western Front into 1941, it cannot turn east on schedule and may face economic collapse. Italy's opportunistic entry depended on an apparently quick German victory, so a prolonged French defense may keep it neutral. Without an Italian war, Britain avoids major Mediterranean losses and can station more ships in or near the Indian Ocean. Japan must then weigh expansion against a much less distracted Royal Navy.