For versions of HTML prior from HTML 2.0 to HTML 4.01 and XHTML 1. X, see their DTD(s) (which are linked from the applicable specification on the W3C site). (Previous versions of HTML weren't so formalised as to have a DTD.
Later versions of XHTML were moving towards schema. HTML 5 is being defined in such a way as to not have an official machine readable specification, but I think there may be third party schemas out there).
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.