Anonymous, Regimental Nicknames and Traditions of the British Army
“ Many infantry regiments have in their early days served as Marines, but the separate Corps seems to have had a corporate existence since the date mentioned above. Splendid service has been rendered on land and sea ever since, and the Marines are as justly considered as being among the best fighting men the Empire has. Their records show them to have taken important parts in many a famous battle on land, whilst contributing their share to every victory afloat.The Royal Marines were, by the French, nicknamed "The Little Grenadiers," from the regiment wearing Grenadier caps. ”
