Wikipedia: Bicycle Infantry

In the years prior to World War I the availability of an extensive network of paved or gravel roads in western Europe made military cyclists appear a feasible alternative to horse mounted troops; on the grounds of economy, simplicity of training, relative silence when on the move and ease of logistical support. The Dutch and Belgian armies, with extensive flat terrain within their national boundaries, maintained battalion or company sized units of cyclists.

As noted above, the level Belgian terrain made military cyclists a particularly useful corps prior to the trench warfare of WWI. Each of the four Belgian carabinier battalions included a company of cyclists, equipped with a brand of folding, portable bicycle named the Belgica. A regimental cyclist school gave training in map reading, reconnaissance, reporting and the carrying of verbal messages. Attention was paid to the maintenance and repair of the machine itself.[5]

now this is really interesting . being a road biker myself never really thought about this . thanks for posting.

Excellent. Thanks Dan! Any idea on how the bike was carried strapped to the back?

Rgds Victor

Thanks!

Not much. Even if you had a frame and canvas strap to hold it securely on your back, carrying the folded and packed bicycle would not be fun.

All the best,
Dan