At Heiligerlee in the northern Netherlands, forces loyal to William of Orange's brother Louis of Nassau ambushed and routed a Spanish royalist army, killing its commander. The victory, though small in scale, is traditionally regarded as the opening battle of the Dutch Revolt against Habsburg Spain—a war that would last eighty years and eventually birth the independent Dutch Republic.
The Spanish Habsburgs had ruled the seventeen provinces of the Low Countries with growing severity, imposing heavy taxation and religious persecution against Protestants. By 1568, resentment had curdled into open rebellion, and Louis of Nassau, brother of the Prince of Orange, raised an army in the northeastern region of Groningen.
At Heiligerlee, Louis's forces ambushed a Spanish royalist column led by Jean de Ligne, Count of Aremberg. Aremberg was killed in the fighting, along with Adolf of Nassau, Louis's own brother, who died leading a cavalry charge. Despite the personal loss, the rebel victory electrified Protestant sympathizers across the Low Countries and is conventionally dated as the start of the Eighty Years' War.
The war ground on for generations, seeing atrocities, sieges, and the rise of William the Silent as a national hero, before culminating in the 1648 Peace of Münster, which recognized the independence of the Dutch Republic—a nation that would go on to found a global trading empire and usher in a golden age of art and science.
Key people: Louis of Nassau, William of Orange, Jean de Ligne