If Japan lost in China before Pearl Harbor, would it attack south and strike Pearl Harbor earlier?
Short answerNot necessarily; the immediate result could be Army-Navy recrimination or internal conflict, although Japan might also redouble its effort in China.
NotesThe answer cautions against treating a Japanese defeat in China as a simple trigger for an earlier southern offensive or attack on Pearl Harbor. The Imperial Japanese Army and Navy could blame one another for the failure, worsening an already severe institutional rivalry. That conflict might produce renewed efforts in China, a struggle over strategy, or even civil disorder rather than a coherent maritime pivot. The underlying point is that defeat changes domestic power relationships as well as operational plans.