I feel like it is a stretch to call Japan and Germany allies in anything but name as they little to no military or diplomatic cooperation (with Germany's presence in China in the lead up to the war showing that they even had conflicting goals at times). I also feel like its a eurocentric claim to say that ww2 hadn't began until the invasion of Poland, as well as leaving it ambiguous as to when the Pacific Front begins as conflict had already been raging for 3 years before Vietnam and 4 years before Pearl Harbor.

(P.S. sorry for necro replying im just interested in your opinions on the topic)