https://www.quora.com/What-kind-of-methods-did-Adolf-Hitler-use-to-persuade-in-his-speeches
http://cdn.newsapi.com.au/image/v1/9928a00deae62557bb15fd17a92def72?width=1024
https://www.ushmm.org/wlc/en/article.php?ModuleId=10005070
http://www.totallyhistory.com/battle-of-belgium/
https://en.wikipedia.org/wiki/Netherlands_in_World_War_II
http://3.bp.blogspot.com/-nm4hOjTN65Y/TrjW43NgxsI/AAAAAAAAHFc/RO7DtAdBgaA/s1600/german-soldiers-paris-1940.jpg