What languages are you functional enough in to to research other than in English?
Here's an idea in English: a detailed look at the US war games prior to entry, with an analysis of the problems as presented, and the actual results.
Another interesting topic is the culture of risk avoidance seen in the Japanese naval surface forces, when they repeatedly fled inferior forces.
Third, if you can research in German - civil disobedience in the last half of the Nazi period.
I can research in German. My French is awful...well, my German isn’t superb anymore either. Japanese, Polish, Italian, are right out.
U.S. War games prior to 1941. That is very interesting and I hadn’t thought of that. That might be a real interesting topic.
Thanks.