Franz Rintelen, a German naval intelligence agent, wrote a bestselling book about his experiences in the United States in 1915, called "The Dark Invader." Highly exaggerated, Rintelen duped historians with his stories for 100 years. In reality, he went rogue and was outed by German intelligence officials. Read the true facts
http://felixsommerfeld.com/news/mexic...The Secret War on the United States in 1915: A Tale of Sabotage, Labor Unrest, and Border Troubles (The Secret War Council)