Throughout World Struggle II cities protected themselves from nightime air raids with blackouts. All streetlights had been turned off and automobiles needed to drive with their headlights off. Residents had been banned from utilizing exterior lights and needed to fastidiously cowl all home windows and openings with curtains or covers to make sure that no mild shone exterior. This made it rather more tough for the bombers to find and hit their targets. All main German cities and cities besides one operated this coverage.
Konstanz in Baden-Württemberg lies near the Swiss border. Switzerland was impartial and allied bombers had been ordered to keep away from it. Its cities and cities had been effectively lit. By intentionally retaining all its lights on Konstantz was capable of deceive the attackers into considering it was in Switzerland so that they flew on previous.