This book details the Soviet Military Liaison Mission (SMLM) in West Germany and the U.S. Military Liaison Mission (USMLM) in East Germany as microcosms of the Cold War strategic intelligence and counterintelligence landscape. Thirty years since the fall of the Berlin Wall, the Soviet and U.S. Military Liaison Missions are all but forgotten. Their operation was established by a post-WWII Allied occupation forces' agreement, and missions had relative freedom to travel and collect intelligence throughout East and West Germany from 1947 until 1990. This book addresses Cold War intelligence and counterintelligence in a manner that provides a broad historical perspective and then brings the reader to a never-before documented artifact of Cold War history. The book details the intelligence/counterintelligence dynamic that was among the most emblematic of the Cold War. Ultimately, the book addresses a saga that remains one of the true Cold War enigmas.