The ratlines were systems of escape routes for German Nazis and other fascists fleeing Europe from 1945 onwards in the aftermath of World War II. These escape routes mainly led toward havens in Latin America, particularly in Argentina, though also in Paraguay, Colombia, Brazil, Uruguay, Mexico, Chile, Peru, Guatemala, Ecuador, and Bolivia, as well as the United States, Canada, Australia, Spain, and Switzerland.

Paraguay, officially the Republic of Paraguay, is a landlocked country in South America. It is bordered by Argentina to the south and southwest, Brazil to the east and northeast, and Bolivia to the northwest. It has a population of around 6.1 million, nearly 2.3 million of whom live in the capital and largest city of Asunción, and its surrounding metro area.