Large scale international espionage was created by private postal services: https://www.discover-innsbruck.at/en/thurn-und-taxis-und-die-erfindung-der-post/ htt

Large scale international espionage was created by private postal services: https://www.discover-innsbruck.at/en/thurn-und-taxis-und-die-erfindung-der-post/ https://www.discover-innsbruck.at/en/thurn-und-taxis-und-die... which replaced the Imperial Reichspost. Later the center of espionage (letter opening) moved from Innsbruck to Frankfurt, with the Rothschild's taken over the news business for financial benefit, and nowadays the Frankfurt and Amsterdam InterXion's.