It is unlikely for a marching army to collapse a bridge unless the bridge was already structurally compromised. The weight distribution of marching soldiers is typically spread out enough to not generate enough force to collapse a bridge.
A column of soldiers will never march across a bridge for this reason. The steady oscillation that occurs can, over time cause structural issues with even a well built bridge. It may not actually collapse (although not out of the question) but it can cause serious damage if the marching approaches the resonant frequency.
The classic example of resonant frequency that every engineer has had to watch the video of is the Tacoma narrows bridge. There are also many examples that Tesla explained on this subject.
A common myth, that a large group marching in step could collapse a bridge.
Collapse of Jiujiang Bridge happened in 2007.
Maccabiah bridge collapse happened in 1997.
Collapse of Can Tho Bridge happened in 2007.
Wootton bridge collapse happened on 1861-06-11.
Glanrhyd Bridge collapse happened on 1987-10-19.
Minneapolis.
It will collapse
nope
Sultan Abdul Halim ferry terminal bridge collapse happened in 1988.
The noun 'collapse' is an abstract noun when it refers to the failure of something abstract (an emotional collapse, the collapse of the Soviet Union).The noun 'collapse' is a concrete noun when it refers to the failure of a physical structure (a mine collapse, a bridge collapse).
I think it changed bridge building laws