Why are soldiers often told not to march in unison over a bridge
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John Lewis joins presidential hopefuls on Selma's Bloody Sunday march, US news
Predictable rump of passive money won't last
TIL that soldiers stop marching in unison when crossing bridges so they don't collapse. : r/todayilearned
Live updates: Japan emperor, empress head to UK for funeral – Daily Freeman
A bridge too far
Leaves From an Officer's Journal - The Atlantic
Why are soldiers often told not to march in unison over a bridge? - Quora
I Held Up My Hand and Became a Sailor (U.S. National Park Service)
Is it true that soldiers marching, all in step, on a bridge could cause a bridge to collapse? - Quora
Welcome to the Green Machine – Texas Monthly
Marching - Wikipedia
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