The history of the Jews in Latin America began with conversos who joined the Spanish and Portuguese expeditions to the continents. The Alhambra Decree of 1492 led to the mass conversion of Spain's Jews to Catholicism and the expulsion of those who refused to do so. However, the vast majority of Conversos never made it to the New World and remained in Spain slowly assimilating to the dominant Catholic culture. This was due to the requirement by Spain's Blood Statutes to provide written documentation of Old Christian lineage in order to travel to the New World.