A Bicycle Built for Two was a favorite song of World War One. This 1931 recording is the backdrop to WW1 pnotos, many of which are of the dead and wounded. The second from last images is of a ward for wounded soldiers.
The Canadian Corps of Cyclists fought at Ypres, Vimy Ridge, Passchendacle and was the first unit across the Rhine in late 1918. The bicycle was equipped in the same manner that a horse would be: bed roll on the front and a rifle sling on the side of the bike. The radio man had the heavy radio attached to the back of his bike. Collectibles from this unit are sought after since it was so specialized and the artifacts are rare since the equipment was left behind at the end of the war. Not one bicycle made it back to Canada. The rationale was it cost too much money to ship the material home.