The naval Battle of Borsele took place on 22 April 1573 during the Eighty Years' War between a Spanish fleet commanded by Sancho d'Avila and a Gueux fleet under Admiral Worst.
The Spanish fleet sailed from the port of Antwerp to try to supply the cities of Middelburg and Arnemuiden, which were besieged by Dutch troops. A few ships managed to reach their objective but the bulk of the Spanish ships was forced to return to Antwerp.
The original article can be found at Battle of Borsele and the edit history here.