The Expulsion of the Moriscos was decreed by King Philip III of Spain on April 9, 1609. The Moriscos were descendants of Spain's Muslim population who had been forced to convert to Christianity. Since the Spanish were fighting wars in the Americas, feeling threatened by the Ottomans raiding along the Spanish coast and by two Morisco revolts in the century since Islam was outlawed in Spain, it seems that the expulsions were a reaction to an internal problem of the stretched Spanish Empire. Between 1609 and 1614, the Crown systematically expelled Moriscos through a number of decrees affecting Spain's various kingdoms, with varying levels of success. Between 1492 and 1610, about three million Muslims left or were expelled from Spain.