 Complete the following phrase:  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 Deaths Head by the German soldiers who encountered cuirassiers so equipped. The cuirassiers armour would have been exceptionally heavy and thicksometimes up to thirty-six kilogrammes eighty poundsand would be expected to stop a bullet. A regiment of cuirassiers killed the Swedish king Gustavus Adolphus at the 1632 