Philip II ordered the death of all the inhabitants of Holland!!

On February 16, 1568, the entire population of the Netherlands—three million—was condemned to death as heretics, apart from a few named exceptions:

Philip next submitted a "Memorial and Representation" of the state of the Low Countries to the Spanish Inquisition craving the judgment of the Fathers upon it. After deliberating, the inquisitors pronounced their decision on the 16th of February, 1568. It was to the effect that, "with the exception of a select list of names which had been handed to them, all the inhabitants of the Netherlands were heretics or abettors of heresy, and so had been guilty of the crime of high treason." On the 26th of the same month, Philip confirmed this sentence by a proclamation, in which he commanded the decree to be carried into immediate execution, without favour or respect of persons. The King of Spain actually passed sentence of death upon a whole nation. We behold him erecting a common scaffold for its execution, and digging one vast grave for all the men, and women, and children of the Low Countries. "Since the beginning of the world," says Brandt, "men have not seen or heard any parallel to this horrible sentence. (Wylie, History of Protestantism, vol. II, p. 70.)

Ten days later, the Spanish King Philip II ordered Alba to carry out the sentence. In the terror which followed, the wealth of the prosperous merchants made them a particular target, and axe, rope, and fire consumed the natural leaders of Dutch society. Alba wrote to Philip coolly estimating the number to be executed after Holy Week 1568 'at eight hundred heads'. Alba is said to have admitted to personal responsibility for 18,600 executions during his six-year tenure—a plausible figure, but the additional number massacred with increasing barbarity by his troops is incalculable.

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Related:
Heroic Holland