Colonial Cuba was a frequent target of buccaneers, pirates and French corsairs seeking Spain's New World riches. In response to repeated raids, defenses were bolstered throughout the island during the 16th century. In Havana, the fortress of Castillo de los Tres Reyes Magos del Morro was built to deter potential invaders, which included the English privateer Francis Drake, who sailed within sight of Havana harbor but did not disembark on the island. Havana's inability to resist invaders was dramatically exposed in 1628, when a Dutch fleet led by Piet Heyn plundered the Spanish ships in the city's harbor. In 1662, English pirate Christopher Myngs captured and briefly occupied Santiago de Cuba on the eastern part of the island, in an effort to open up Cuba's protected trade with neighboring Jamaica.