As early as 1947,
Simon Wiesenthal began to identify escape routes used by Nazis to escape from Germany. The main route he discovered was from the small Bavarian town of Memmingen to Innsbruck, Austria. From there, it was possible to cross into Italy over the Brenner pass.
Wiesenthal later learned the Nazis referred to this as the "B-B" route, from Bremen in Germany to the Italian port of Bari. He also knew that the fugitives had little or no difficulty obtaining false papers and seemed to have enough money available in their new home to establish comfortable new lives.
Wiesenthal concluded a secret organization with substantial resources had to be involved in helping fugitive Nazis. The seeds of that project were planted before World War II ended.