I believe that it is the monroe Doctrine
For this question I would go on YouTube if you can and search The Great Dictator by Charlie Chaplin. It is a classic but it would help you so much with this report. Also the movie 'Unbroken' will help. If you need help message me because I had to do the same exact report when I was in 6th grade. Also here is a website from some of the soldiers experiences; http://www.military.com/Content/MoreContent?file=VSworld_war2
I believe that freedom of expression should definately have limitations. although the freedom to speak what's is on our mind produces new ideas and is a very big part of our society, however without limitations society would be at Chaos. you have every right to speak out your opinions without judgement and interference but you are not allowed to say whatever you want ( ex. workplace). the right to free speech only applies if the government is trying to restrict it.