This looks like World War 11, not II or 2! Here is Writeacher's lesson on "how to search:"
It looks as if what you need to do is learn how to conduct thorough and effective searches for yourself. That's what research is, and I'm sure that's what your teacher expects you to do -- conduct research. You are searching for information that is so specific that you have to be prepared for the possibility that none of it may be online. Or some may be, and some may not. In addition to searching on the Internet, you also need to make best friends with the reference librarian(s) in your local or college library.
At this webpage, you can go immediately to the search sites (first three columns across the top) -- or even better you can scroll down until you see the section called HOW TO SEARCH THE INTERNET. Those are the links to start with. You'll not only learn how to come up with good search terms, but also how to evaluate the webpages you get as results. Some will be good and others will be garbage. You need to know how to tell the difference.
My favorite way to search is to go to Google's advanced search page
< http://www.google.com/advanced_search?hl=en > and put my search words or phrases into the first or second search box (either "all the words" or "exact phrase"). However, there many other strategies for searching you can use, and the HOW TO SEARCH THE INTERNET section will help you best.
Learning HOW to use Google or other search engines can save you time and help you learn to find information efficiently. Here are some websites that can teach you how:
... and one to help you judge whether a particular website's information is worth your time:
Just a suggestion: you might want to take a look at "1984" by George Orwell, which was written shortly after WW2 and which describes a fictional dystopian future in which the war never ended, and which includes the following view (which was probably the one held by the author) of how the situation came about:
"To understand the nature of the present war - for in spite of the regrouping which occurs every few years, it is always the same war - one must realize in the first place that it is impossible for it to be decisive. None of the three superstates could be definitely conquered even by the other two in combination. They are too evenly matched, and their natural defenses are too formidable. Eurasia is protected by its vast land spaces, Oceania by the width of the Atlantic and the Pacific, Eastasia by the fecundicity and industriousness of its inhabitants. Secondly, there is no longer, in a material sense, anything to fight about. With the establishment of self-contained economies, in which production and consumption are geared to one another, the scramble for markets which was a main cause of previous wars has come to an end, while the competition for raw materials is no longer a matter of life and death. In any case, each of the three superstates is so vast that it can obtain almost all of the materials that it needs within its own boundaries. In so far as war has a direct economic purpose, it is a war for labor power."
You could take that view as a starting point, looking at the trade disputes between the Empire of Japan and the United States during the 1930s which culminated in Pearl Harbor, and consider how economic considerations might have impacted on the United States's intervention in Western Europe. (Apart from anything else, "1984" is a rattling good read, and as relevant now as it was when it was written.)