Walrad of Nassau-Usingen (25 February 1635 in Roermond – 17 October 1702 in Usingen), was from 1659 Count, and from 1688 Prince of Nassau-Usingen and founder of Usingen line of the House of Nassau. He served for most of his career as a general in the Dutch States Army.
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Family
He was the youngest son of Count William Louis of Nassau-Saarbrücken and Anna Amalia of Baden-Durlach, daughter of the Margrave George Frederick of Baden-Durlach.
Military career
Walrad was a respected military leader. At different times, he was General Field Marshal of the Holy Roman Empire of German Nation and of the United Provinces of the Netherlands under Prince William III of Orange. In 1664, he hurried to Szentgotthárd, but he came too late to fight in the Battle of Saint Gotthard. In 1683, he fought successfully in the battle to lift the Turkish siege of Vienna. So he had a role in ensuring that the Islamic conquest of Central Europe by the Ottomans failed. For these feats, King John III Sobieski of Poland granted him the Order of the White Eagle, the highest Polish distinction.