I need some answers which are concise but relatively detailed. I found multiple sites saying different things and they don't really support eachother. If someone can just give me a few bulletpoints of what the reasons of Japan joining WWII are, it would be really helpful. Thank you
Can you be specific? When you say "entered WWII" do you mean Pearl Harbor or simply being belligerent to other countries? It may be difficult to give a complete answer to the latter (Japan had been at war with China since 1937) but if you are just wondering why the political-economic climate resulted in Japan attacking the U.S., that's a bit easier. When I have time I'll link some good responses to that question if this is still unanswered.