During the Second World War Germany was the country that had paramilitary death squads.
Called “Einsatzgruppen” were special SS and police units that had the task to secure occupied territories in eastern Europe. These squads carried out the mass murder of Soviet Jews and political opponents.
The first engagement by African-American soldiers against Confederate forces during the Civil War was at the Battle of Island Mound in Bates County, Missouri on October 28–29, 1862.
Concord, Lexington, Breed's, Dorchester
I do not think so.
In my opinion, the foreign policy of the current US government has diminished the country's relative importance to the world. The United States has always been considered the country of freedom and the American dream. However, the sense of freedom has diminished before the preaching of nationalism. Anyway, I believe it is possible that the US will once again be the best country in the world. Governments and their policies are transient, we have a solid democracy and our culture is still hegemonic.