Who was the Grand Duke of Alba and Iron Duke in the Netherlands that defeated William the Silent's invading army?
Fernando Álvarez de Toledo, 3rd Duke of Alba Fernando Álvarez de Toledo y Pimentel (29 October 150711 December 1582), known as the Grand Duke of Alba in Spain and the Iron Duke in the Netherlands, was a Spanish noble, general, and diplomat. He was titled the 3rd Duke of Alba de Tormes, 4th Marquis of Coria, 3rd Count of Salvatierra de Tormes, 2nd Count of Piedrahita, 8th Lord of Valdecorneja, Grandee of Spain, and a Knight of the Order of the Golden Fleece. His motto in Latin was "Deo patrum Nostrorum", which in English means "To the God of our fathers".
Battle of Worringen The conflict arose after Duke Waleran IV of Limburg, a scion of the Lotharingian Ardennes-Verdun dynasty, had died without male heirs in 1279. His duchy was inherited by his daughter Ermengarde, who had married Count Reginald I of Guelders about 1270. Her husband claimed the Limburg heritage and in 1282 had his ducal title recognized by the German king Rudolf I.