CASUALTY RECORD // April 25, 1607
Battle of Gibraltar
Estimated casualties — killed, wounded, captured, and missing — by side, with confidence labels per surviving record.
Casualties by side
1 sides catalogued · combined 4,000 estimated
Spain
4,000
Medium-confidence figure
Battle context
The Battle of Gibraltar, fought on 25 April 1607 during the Eighty Years' War, is recorded with Spanish casualties of 4,000, indicating a substantial Dutch Republic victory against Spanish naval forces under Juan Álvarez de Avilés. The engagement was commanded on the Dutch side by Jacob van Heemskerk. Within the broader context of the Eighty Years' War — a prolonged conflict between the Dutch Republic and the Spanish Habsburg state over sovereignty, religion, and political autonomy — a battle inflicting losses of this scale on Spanish forces would have carried operational significance for Dutch efforts to contest Spanish naval power. Beyond these structured facts, the specific strategic consequences of the engagement are not recorded here.
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