The great or classic era of piracy in the Caribbean extends from around 1560 up until the 1720s. The period during which pirates were most successful was from the 1640s until the 1680s. Caribbean piracy arose out of, and mirrored on a smaller scale, the conflicts over trade and colonization among the rival European powers of the time, including England, Spain, Dutch United Provinces, and France. Two of the best-known pirate bases were Tortuga in the 1640s and Port Royal after 1655.
A privateer or corsair used similar methods to a pirate, but acted while in possession of a commission or letter of marque from a government or king authorizing the capture of merchant ships belonging to an enemy nation. The famous Barbary Corsairs of the Mediterranean were privateers, as were the Maltese Corsairs, who were authorized by the Knights of St. John. The letter of marque was recognized by convention—for example, the United States Constitution of 1787 specifically authorizes Congress to issue letters of marque and reprisal—and meant that a privateer could not technically be charged with piracy. This nicety of law did not always save the individuals concerned, however, as whether one was considered a pirate or a legally operating privateer often depended on whose custody the individual found himself in—that of the country that had issued the commission, or that of the object of attack.
