In Germany, nearly everyone is in a uniform of some kind, apart from servants and menials, and obviously foreigners. Swastikas are everywhere.
People avoid looking into each others eyes.
In occupied areas, fear is in those occupied, arrogance in the occupying troops, especially the SS and Gestapo. Most places show a few signs of fighting, and there are usually a few bodies of 'criminals' who have been hung which are on display in public squares and the like. Ju-87 Stukas have struck fear into populations all over Europe. Travel is regulated - permits stamped by the local Polizeifuhrer are needed. Superhumans who join the Nazis are given an amnesty.