OPROP!

The leaflets were signed by the head of Operation Weserübung Süd, General Leonhard Kaupisch.

When the German infantry arrived at the Amalienborg Palace in the morning of 9 April 1940, they were met with determined opposition from the King's Royal Guard, which repelled the initial attack, suffering three wounded.

This gave Christian X and his ministers time to confer with the Danish Army chief General William Wain Prior.

As the discussions were ongoing, several formations of Heinkel He 111 and Dornier 17 bombers overflew the city dropping the OPROP!

Faced with the explicit threat of the Luftwaffe bombing the civilian population of Copenhagen, and only General Prior in favour of continuing the fighting, the Danish government capitulated in exchange for retaining political independence in domestic matters.