Because I thought that it's high time I posted some more USEFUL information, I think I'll delve into the historical background a bit more, for those of you dunces who have failed your history classes out of sheer boredom. I will point out the obvious ones; if you know some characters whom I don't mention and you know for a fact that they existed in real life, feel free to add.
JAPAN:
Mikado: In WWII, there was no "Empress". There was, however, an emperor - Emperor Hirohito. And he was a figurehead, much unlike the Mikado we know.
Tougou Tsuyoshi: He was the Chief Admiral of the Japanese Imperial Fleet during the Russo-Japanese War. I don't think the real Tougou was that big of a pimp, though. If he was, then that's just golly.
REPUBLIC OF GAMERICA:
Eagle Douglas: Took me a while to figure this one out when I shouldn't have. Embodies Douglas MacArthur, American head commander in the Philippines when the Japanese invaded. If you pay attention to the endscene that plays after you take over Manila2000, you will see Eagle Douglas utter the same words that MacArthur said when he was forced to leave: "I Shall Return." Only, in Daiteikoku, he won't do that. Rather, you won't let him.
President Roose: If you can't tell by the name, this is the polar opposite of President Franklin Delano Roosevelt, US President and Chief Commander of the United States forces in WWII. Funny how they made him in this game.
The Four Girls: I'm damn sure they're all parodies of important people, but I'm not sure exactly whom. I have my guesses, but I'll keep them to myself for now...
AERIS EMPIRE:
Sarah Britten: Queen of England. Dunno who exactly she is supposed to signify, because I'm pretty sure there was a king on the throne during WWII. My guess is Queen Elizabeth, because Elizabeth's half-sister's name of Mary Tudor, and in Daiteikoku Sarah's sister's name is also Mary, but this time Mary Britten. Dunno where the Mom, Eliza, came from.
John Lawrence: This is obvious: Lawrence of Arabia. Strange enough, John ain't in Arabia, nor do you capture him there. You get Nelson. Weird.
Victory Nelson: This is also obvious: Horatio Nelson, head admiral of the British Royal Navy that defeated Napoleon. Gotta love his name in this game, can't get over it.
Claude Montgomery: This too is obvious: General Montgomery of the British North African Army in WWII, helped the Americans squeeze the Nazi's and Italians out of North Africa. I believe that just like in history, you first meet Montgomery at Suez, where in WWII he managed to prevent the Nazi's from conquering the Suez Canal.
Empire of Espana:
These two are major DUH's, even though they're wayyyy outta context. King Ferdinand and Queen Isabella, anyone? Just why they're fighting each other, we have no idea.
United Human Organization of Soviet (God I hope I got that name right):
Katerlin (Yes, that's how you spell her name in English): probably a lolified Catherine the Great. Dunno if she had a single best friend constantly with her all the time, though.
Zhukov Georgy (I think I butchered his name, but I could care less): He is the parody of a high-ranking minister of the czarist regime in Russia. True to his original historical nature, Zhukov in Daiteikoku had also worked as a high-ranking minister in the previous Russian monarchy, and when Katerlin and others came along, became a Soviet and worked for them as well.