Why are army troops not allowed to march in steps while crossing the bridge?

Why are soldiers asked to break steps while crossing a bridge ?

A platoon of soldiers marches on a road in steps accoridng to the sound of a marching band The band iS stopPed and the soldiers are ordered to break the steps while crossing the bridge. Why?

A platoon of soldiers marches on a road in steps accoridng to the sound of a marching band The band iS stopPed and the soldiers are ordered to break the steps while crossing the bridge. Why?

Marching soldiers are asked to break their steps while crossing a bridge. Why?

A platoon of soldiers marches on a road in steps accoridng to the sound of a marching band The band ils stoped and the soldiers are ordered to break the steps while crossign as bridge. Why?