June 8, 1708 the count of Casa Alegre knew a squadron of English warships was lurking in the area, but he thought he could avoid it. As captain of the Spanish galleon San José, he was charged with leading the Tierra Firma fleet from the Caribbean back to Spain, 17 ships in all, loaded with several years’ worth of treasure from the New World, enough perhaps to turn the tide of war in Europe. Casa Alegre had no doubt the English would be after the precious cargo. If he could reach the harbor of Cartagena de Indias, on the coast of what is now Colombia, the fleet would be safe.
Then they appeared on the horizon to the north. Four English sails. To give the fleet’s merchant ships a chance to reach the harbor, Casa Alegre had no choice but to turn and fight. He hoisted the red battle flag up the mainmast and sailed toward the enemy, accompanied by two armed galleons.
As in a bar brawl, the two most fearsome combatants sought each other out. At sunset, the 70-gun HMS Expedition, helmed by Commodore Charles Wager, took on the 62-gun San José. For more than an hour, they traded broadsides, sailing past each other while firing their cannons at close range, pulverizing wood and bone.
Read the complete article in Vanity Fair. Also, refer to this article in Wikipedia.