Like many countries, Denmark had bicycle regiments. On this website, I found these photos and detailed information about how in 1937 a Bicycle Regiment was formed.
Typical Danish response to a warmonger rapidly growing in strength to the south... "let's get some bicycles..." :-)
From what I understand, the 4th Battalion's Bicycle Regiment saw some action near Bredevad when the Germans invaded on April 9, 1940, and this picture is taken that day.
A support vehicle with a bike workshop and reserve bicycles. 1940.
The 4th Battalion's Bicycle Company training in 1938.