Spain did not yet see the need for an impregnable fort here. After the English failures at Roanoke Island in North Carolina in 1586-87, the weak settlement of Jamestown, Virginia, a few years later did not impress the powerful Council of the Indies in Madrid as a threat to Spanish interests. Moreover, the Franciscans, by extending the mission frontier deep into Indian lands, put the Spanish stamp of occupation upon a vast territory. The fallacy in this thinking lay in underestimating the colonizing ability of the English and believing that an Indian friendly to Spain would never become a friend of England.

The defeat of the powerful Spanish Armada in 1588 was a dramatic harbinger of things to come; the way was clear for England to extend its control of the seas. Its great trading companies were active on the coasts of four continents, and powerful English nobles strove for possessions beyond the seas. Jamestown, despite its inauspicious beginning, was soon followed by the settlements in New England and elsewhere. Between the James River and Spanish Florida stretched a vast, rich territory too tempting to ignore, and in 1665 Charles II of England granted a patent for its occupation. The boundaries of the new colony of Carolina brazenly included some hundred miles or more of Spanish-occupied land—even St. Augustine itself!

The signs were clear: The fight for Florida was inevitable.

In the middle 1600s at St. Augustine, just south of where the Castillo now stands, there was a wooden fort. It was almost as large as the Castillo, but it was a fort only in name. Most of the timbers were rotten. Smallpox had killed so many Indians that there were not enough laborers to carry in replacement logs.

Money to maintain the outposts came from New Spain, for, the government in Madrid reasoned, the Florida forts protected the commercial routes from México to Spain. Consequently, officials in México City had to find the silver to pay the troops and buy the food, clothing, and other supplies that Florida so desperately needed. Despite the orders from Madrid, payments from México City were always behind, as Floridians knew from bitter experience.

Yet, if ever there was a time to protect Spanish interests in Florida, it was now. The English had attacked Santo Domingo and captured Jamaica. The Dutch had been seen in Apalache Bay on Florida’s west coast. As the corsairs grew bolder, one governor made this appraisal: “In spite of the great valor with which we would resist, successful defense would be doubtful” without stronger defenses.

Proposals for a permanent, stone fort dated back to 1586 after the discovery of the native shellstone, coquina. For years officials in Spain, México, and Florida argued about what needed to be done. By 1668 payments and sufficient supplies of food were eight years behind. The townspeople and the soldiers lived in poverty and the old wooden fort was on the verge of falling into the sea.

The sack of St. Augustine was a blessing in disguise, for it shocked Spanish officials into action. The governor of Havana lent 1,200 pesos for masting and rigging St. Augustine’s frigate, thus ensuring the presidio’s communication with its supply bases. The Viceroy released the 1669 payroll plus money for general repairs, weapons, gunpowder, and lead for bullets. He also promised 75 men to bring the troop levels to authorized strength. And St. Augustine was allowed to keep an 18-pounder bronze cannon that had been salvaged from a shipwreck. This aid—12 months of life for the colony—totaled at least 110,000 pesos. Included was the hire of mules for the 75 recruits to ride from México City to Veracruz. Hiring the animals was easier than finding men, however. Fifty-one of them arrived at last in 1670; the rest had deserted or died. Officials in St. Augustine, however, were not sure that the new troops were particularly loyal to Spanish interests.

It was Mariana, Queen Regent of Spain, who gave permanent aid to St. Augustine in three decrees addressed to the viceroy. On March 11, 1669, she ordered him to pay the Florida funds on time and add a proper amount for building the fortification proposed by the governor. Next, on April 10, she commanded him to support a full 300-man garrison in Florida instead of the customary 257 soldiers and 43 missionaries. Finally, on October 30, she enjoined him to consult with the governor about an adequate fortification and provide for its construction.