Ratlines were a system of escape routes for Nazis and other fascists fleeing Europe at the end of World War II. These escape routes mainly led toward havens in Latin America, particularly Argentina, Paraguay, Colombia,Brazil, Uruguay, Mexico, Guatemala, Chile, Ecuador and Bolivia, as well as in Switzerland. Other destinations included Australia, Canada, and the Middle East. There were two primary routes: the first went from Germany to Spain, then Argentina; the second from Germany to Rome to Genoa, then South America. The two routes developed independently but eventually came together to collaborate.
The origins of the first ratlines are connected to various developments in Vatican-Argentine relations before and during World War II. As early as 1942, Monsignor Luigi Maglione contacted Ambassador Llobet, inquiring as to the "willingness of the government of the Argentine Republic to apply its immigration law generously, in order to encourage at the opportune moment European Catholic immigrants to seek the necessary land and capital in our country". Afterwards, a German priest, Anton Weber, the head of the Rome-based Society of Saint Raphael, traveled to Portugal, continuing to Argentina, to lay the groundwork for future Catholic immigration; this was to be a route which fascist exiles would exploit. According to historian Michael Phayer, "this was the innocent origin of what would become the Vatican ratline".
Spain, not Rome, was the "first center of ratline activity that facilitated the escape of Nazi fascists", although the exodus itself was planned within the Vatican.Charles Lescat, a French member of Action Française (an organization suppressed by Pius XI and rehabilitated by Pius XII), and Pierre Daye, a Belgian with contacts in the Spanish government, were among the primary organizers. Lescat and Daye were the first to flee Europe with the help of Argentine cardinal Antonio Caggiano.