to perform espionage activities in the United States, forming various spy rings. Particularly during the 1940s, some of these espionage networks had...

The United States of America has conducted espionage against the Soviet Union and its successor state, the Russian Federation. Throughout the Cold War...

espionage in the United States has occurred since at least the Cold War (as the Soviet Union), and likely well before. According to the United States...

the section concerning detection of spying, and analysis of a wide host of intelligence disciplines. Soviet espionage in the United States during the...

by the Federal Bureau of Investigation History of espionage Soviet espionage in the United States Wen Ho Lee Earl., Haynes, John (2010). Spies : the rise...

messages. The signals intelligence yield included discovery of the Cambridge Five espionage ring in the United Kingdom and Soviet espionage of the Manhattan...

between the Soviet Union and the United States were fully established in 1933 as the succeeding bilateral ties to those between the Russian Empire and the United...

concealed inside a gift given by the Soviet Union to W. Averell Harriman, the United States Ambassador to the Soviet Union, on August 4, 1945. Because...

Nuclear espionage is the purposeful giving of state secrets regarding nuclear weapons to other states without authorization (espionage). There have been...

The Espionage Act of 1917 is a United States federal law enacted on June 15, 1917, shortly after the United States entered World War I. It has been amended...