Cuirassiers played a very large role in the Thirty Years' War and the related Eighty Years' War, particularly under the House of Orange and Duchy of Savoy. They represented the last gasp of full plate armour on the battlefield. They would have worn very distinctive plate armour, which typically featured very long and wide tassets, articulated leg protectors which would extend all the way from the breastplate down to the knees. The head would typically have been protected by a fully enclosed burgonet, of which the "Savoyard" style was one notable type. This rounded helmet, frequently featuring a stylized or grotesque face mask, was nicknamed "Totenkopf" or "Death's Head" by the German soldiers who encountered cuirassiers so equipped. The cuirassier's armour would have been exceptionally heavy and thick—sometimes up to thirty-six kilogrammes (eighty pounds)—and would be expected to stop a bullet. A regiment of cuirassiers killed the Swedish king Gustavus Adolphus at the 1632 Battle of Lützen. The French introduced their own cuirassiers in 1666. However, the amount of armour worn by the cavalry of the European armies in battle had been substantially reduced, with even the cuirass often worn only to the front.