USASA FS BERLIN

USASA Field Station Berlin was a United States Army Security Agency (USASA) signals intelligence unit operating in West Berlin during the Cold War. Established in the early 1950s, the unit played a crucial role in monitoring and intercepting Soviet and Eastern Bloc military communications. Stationed at Teufelsberg, a man-made hill built atop WWII rubble, the unit's personnel operated sophisticated listening equipment that contributed significantly to Western intelligence efforts. USASA FS Berlin remained active until German reunification, with operations eventually transitioning to other U.S. intelligence agencies before the site's closure in the early 1990s.