Complex sentence: Originally designed to keep straps from back packs or straps holding ammunition pouches or bayonets from slipping off the shoulder, they often display badges of rank, shoulder marks, regimental insignia or epaulettes.
Split into simpler sentences: Originally designed to keep back packs, ammunition pouches or bayonets from slipping off the shoulder. They often display badges of rank, shoulder marks, regimental insignia or epaulettes.