The final triumph of the 700-year Christian reconquest of Spain, marked by the fall of Granada in 1492, was accompanied by the forced conversion of Spanish Muslims (Moriscos). As a result of the Inquisition, thousands of Jews fled or were deported to the Maghrib, where many gained influence in government and commerce.

Without much difficulty, Christian Spain imposed its influence on the Maghrib coast by constructing fortified outposts (presidios) and collecting tribute during the fifteenth and early sixteenth centuries. On or near the Algerian coast, Spain took control of Mers el Kebir in 1505, Oran in 1509, and Tlemcen, Mostaganem, and Ténès, all west of Algiers, in 1510. In the same year, the merchants of Algiers handed over one of the rocky islets in their harbor, where the Spaniards built a fort. The presidios in North Africa turned out to be a costly and largely ineffective military endeavor that did not guarantee access for Spain's merchant fleet. Indeed, most trade seemed to be transacted in the numerous free ports. Moreover, from the sixteenth to the eighteenth century, sailing superior ships and hammering out shrewd concessions, merchants from England, Portugal, Holland, France, and Italy, as well as Spain, dominated Mediterranean trade.

Why Spain did not extend its North African conquests much beyond a few modest enclaves has puzzled historians. Some suggest that Spain held back because it was preoccupied with maintaining its territory in Italy others that Spain's energies were absorbed in obtaining the riches of the New World. Still another possibility is that Spain was more intent on projecting its force on the high seas than on risking defeat in the forbidding interior of Africa.

Data as of December 1993