13. The Oslo Report – Insider Sabotage
In November 1939, German physicist Hans Ferdinand Mayer anonymously sent the “Oslo Report” to the British Embassy in Norway. This seven-page document detailed German military technologies, including radar systems, torpedoes, and the V-2 rocket program. Mayer’s courageous leak provided the Allies with critical intelligence, enabling them to develop countermeasures and significantly impacting the course of World War II (en.wikipedia.org).
