The correct answer is "Chicago, Illinois, during the 1968 Democratic Convention."
The Chicago Police exerted authority brutality during the Demic Convention of 1968. Police exhibited its force against protesters. The police attacked anti-war protesters and peace activist. The convention was held from August 26 to 29, in Chicago, Illinois, and activist groups gathered outside the building of the International Amphitheater to protest against the Vietnam War.
Well there are monuments that honor them and they’re are many books about it. You can also visit Auschwitz and take a guided tour through the camp (Warning it’s very sad)