Speaking Of Japan......

I am nearing the end of my WWII Europe collection. I have a few holes to fill here and there but it is almost complete. Now where do I move on from here? I figure the next spot would be the Pacific during WWII. I have studied the European campaign so long that I don't know one thing about the Pacific campaign. So to the punch line. What is out there as far as this area? What countries? Islands? How do I go about finding what and where? Any suggestions on where I should start?

World War One.

That's a massive area / theatre.

You are getting into colonies of Britain and France and who knows who else.

KGVI stamps of course.

Australia. Japan. China. USA.