One of the main characteristics of a marine is the uniform that he wears. On the sleeves of the Spanish Marines are the three "Sardinetas", which marks it as a member of the Royal House Corps. This was given in recognition for a heroic last stand in the Castillo del Morro of Havana, Cuba against a British expedition in 1762. The only other unit to wear the sardinetas and red trouser stripes is the Spanish Royal Guard. Spanish Marines have modern assets to comply with its mission, having personnel specialised in artillery, sapping, helicopters, special operations, communications, tanks, among others. Some vehicles form the "Grupo Mecanizado Anfibio del Tercio de Armada" (the Mechanized Amphibious Group of the Navy Tercio).