Why are soldiers often told not to march in unison over a bridge

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Why are soldiers often told not to march in unison over a bridge
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Why are soldiers often told not to march in unison over a bridge
Is it true that soldiers marching, all in step, on a bridge could cause a bridge to collapse? - Quora
Why are soldiers often told not to march in unison over a bridge
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Why are soldiers often told not to march in unison over a bridge
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Why are soldiers often told not to march in unison over a bridge
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Why are soldiers often told not to march in unison over a bridge
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Why are soldiers often told not to march in unison over a bridge
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Why are soldiers often told not to march in unison over a bridge
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Why are soldiers often told not to march in unison over a bridge
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Why are soldiers often told not to march in unison over a bridge
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