I've read many history books at education from a variety of historians (mostly from the States). However, those books are away from me now. Much I've learned is that the past cant be clear from ourselves' knowledge. They are subject to life-long studies and expertise. What I see is that even the historians may also disagree on facts. I just wanted to point out that. Also there are so many official archives that are not open to public and, even opened, facts may not be so clear for a long time study.