The first organized corps of marines was created when the Spanish King Carlos V first assigned the naval infantry of the Compañías Viejas del Mar de Nápoles ( Naples Sea Old Companies ) to the Escuadras de Galeras del Mediterráneo ( Mediterranean Galley Squadrons ) in 1537 , progenitors of the current Spanish Navy Marines ( Infantería de Marina ) corps .
The first organized group of marines was created when Charles V first assigned the naval infantry of the Compañías Viejas del Mar de Nápoles ( Naples Sea Old Companies ) to the Escuadras de Galeras del Mediterráneo ( Mediterranean Galley Squadrons ) in 1537 .