Apparently an incident took place in 1831 where a bridge collapsed under soldiers marching, but the Wikipedia article [1] notes that "The conclusion of the inve

Apparently an incident took place in 1831 where a bridge collapsed under soldiers marching, but the Wikipedia article [1] notes that "The conclusion of the investigation was that the vibration caused by the marching precipitated the bolt's failure, but it would have failed eventually anyway". There's more interesting information on synchronization and bridges on Veritasium's video, The Secret of Synchronization [2]. [1] https://en.wikipedia.org/wiki/Broughton_Suspension_Bridge https://en.wikipedia.org/wiki/Broughton_Suspension_Bridge [2] https://www.youtube.com/watch?v=t-_VPRCtiUg https://www.youtube.com/watch?v=t-_VPRCtiUg