From the Wikipedia page about elections in 1933 Germany:

The resources of big business and the state were thrown behind the Nazis’ campaign to achieve saturation coverage all over Germany. Brownshirts and SS patrolled and marched menacingly through the streets of cities and towns. A “combination of terror, repression and propaganda was mobilized in every… community, large and small, across the land”.[1]: 339  Irene von Goetz wrote, “In a decree issued on 17 February 1933, Göring ordered the Prussian police force to make unrestrained use of firearms in operations against political opponents (the so-called Schießerlass, or shooting decree)”.[4]

To ensure a Nazi majority in the vote, Nazi organisations also “monitored” the vote process. In Prussia, 50,000 members of the SS, SA and Der Stahlhelm were ordered to monitor the votes as so-called deputy sheriffs or auxiliary police (Hilfspolizei) in another decree by acting Interior Minister Hermann Göring.[4]

Full page: https://en.wikipedia.org/wiki/March_1933_German_federal_election