Guaranteed original. Complete & intact. This is an original Royal Marine Light Infantry RMLI Regiment Cap Badge for sale. In good condition. Please see our other items for more original WW1, WW2 & post war British military cap badges for sale. The Corps of Royal Marines, the infantry land fighting element of the United Kingdom's Royal Navy, was formed as part of the Naval Service in 1755. However, it can trace its origins back as far as 1664, when English soldiers first went to sea to fight the Dutch. Early in their history, Marines were responsible for leading and repelling boarding attacks on the lower deck, while harassing the enemy from the upper decks with effective musket fire. At present, the Royal Marines are an elite fighting force within the British Armed forces, having undergone many substantial changes.