Hiroshima and Nagasaki. I don't analyze them as pro-Japan (as it would be hypocrisy, as I condemn their view on the nanking massacres), nor pro-USA, but pro-life. It was both countries mistake. Also, the history of the survivors is chilling yet fascinating.
Witold Pilecki, a polish soldier and spy, the only known men to have volunteered to be sent to Auschwitz, so he could gather inside information and organize an uprising. Probably one of the craziest and bravest men who ever lived.
Hitler's raise to power, and his strategies and mistakes. of course I am not pro-Hitler, but it's fascinating to analyze his war strategies, not only in battle but in other actions. Did you know the germans had fake money brought in secretly into the UK to generate inflation?
The brazillian participation in the war, the battles fought in Italy and the brazillian air force (senta pua!), and the pilots and engineers who did miracles.
The D day, now that's a whole story by itself.