WA covers many countries and jurisdictions. However, I think I can answer for the US and possibly most of Europe in this case. First, anyone may ask any question they wish, as long as the question itself imparts no classified information.
And if you don't have access to classified information, either directly or via third parties,you should be fine. In the US, this is protected strongly by the 1st Amendment. General jurisprudence does not allow for penalties for security breaches, when you cannot possibly know the information you're discussing is classified.
This is the reason that classified documents, for instance, are all marked with a level of classification. The law restricts the transfer of classifed information; not the question.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.