this post was submitted on 16 Jun 2025
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[–] bstix@feddit.dk 1 points 2 days ago (2 children)

Shit excuse. It takes more effort not to march in unison.

It's also something that is taught in UK army, since the collapsing bridge incident.

[–] Woht24@lemmy.world 5 points 2 days ago (3 children)

Wild first point but we'll ignore it.

What is the collapsing bridge incident?

[–] bstix@feddit.dk 10 points 2 days ago* (last edited 1 day ago)

It's common knowledge that soldiers don't walk in unison on bridges. It dates back to 1831.

https://en.wikipedia.org/wiki/Broughton_Suspension_Bridge

Same thing happened in France twenty years later:

https://en.wikipedia.org/wiki/Angers_Bridge

It also postponed the opening of a bridge in London by two years in 2000:

https://en.wikipedia.org/wiki/Millennium_Bridge,_London

[–] VegOwOtenks@lemmy.world 3 points 2 days ago

I think this is what they are referring to: https://en.wikipedia.org/wiki/Broughton_Suspension_Bridge.

TL;DR: The bridge collapsed because soldiers marching on it created force they hadn't anticipated, soldiers breaking step supposedly don't have as much of an impact.

[–] samus12345@sh.itjust.works 2 points 2 days ago

London Bridge falling down, falling down, falling down?

[–] threeganzi@sh.itjust.works 1 points 1 day ago

Didn’t it collapse because they walked in unison, causing resonance?