The ODESSA File
The ODESSA is an American codename (from the German: Organisation der ehemaligen SS-Angehörigen, meaning: Organization of Former SS Members) coined in 1946 for a possible Nazi underground escape plan at the end of World War II by a group of SS officers with the aim of facilitating secret escape routes. The idea has been widely circulated in fictional spy novels and movies, notably Frederick Forsyth’s best-selling 1972 thriller The Odessa File. The routes are also called ratlines. The goal was to allow the SS members to escape to Argentina, Brazil, or the Middle East under false passports. This goal was in fact achieved by 300 Nazis with support from Juan Perón after he came to power in Argentina in 1946.
~ Summary from Wikipedia