ABSTRACT
In 1831 60 soldiers were marching across a bridge in Broughton, England, when it
collapsed. It was believed that the fact that the men were marching in step led to the
problem and, according to Zivanovic et al. (2005), since that time notices have
been placed on numerous bridges warning troops to break step when crossing.
They cite an example from a railway suspension bride at Niagara Falls, USA:
