WAtomic spies or atom spies were people in the United States, the United Kingdom, and Canada who are known to have illicitly given information about nuclear weapons production or design to the Soviet Union during World War II and the early Cold War. Exactly what was given, and whether everyone on the list gave it, are still matters of some scholarly dispute. In some cases, some of the arrested suspects or government witnesses had given strong testimonies or confessions which they recanted later or said were fabricated. Their work constitutes the most publicly well-known and well-documented case of nuclear espionage in the history of nuclear weapons. At the same time, numerous nuclear scientists wanted to share the information with the world scientific community, but this proposal was firmly quashed by the United States government.
WOperation Bolívar was the codename for the German espionage in Latin America during World War II. It was under the operational control of Department VID 4 of Germany's Security Service, and was primarily concerned with the collection and transmission of clandestine information from Latin America to Europe. Overall, the Germans were successful in establishing a secret radio communications network from their control station in Argentina, as well as a courier system involving the use of Spanish merchant vessels for the shipment of paper-form intelligence.
WThe Cambridge Spy Ring was a ring of spies in the United Kingdom that passed information to the Soviet Union during World War II and was active from the 1930s until at least into the early 1950s. None were ever prosecuted for spying. The number and membership of the ring emerged slowly from the 1950s onwards. As far as the general public was concerned, this started with the sudden flight of Donald Maclean and Guy Burgess to the Soviet Union in 1951. Suspicion immediately fell on Harold "Kim" Philby, but he did not defect until 1963. Anthony Blunt and John Cairncross, the last two of the group, confessed to British intelligence but this remained a secret for many years, until 1979 for Anthony Blunt and 1990 for John Cairncross. In time the Cambridge Four evolved to become the Cambridge Five. In the innermost circles of the KGB, they were supposedly dubbed as the Magnificent Five.
WThe Culper Ring was an American Revolutionary War spy ring, organized by Major Benjamin Tallmadge and George Washington, set up in 1778 during the British occupation of New York City. The name "Culper" was suggested by George Washington, taken from Culpeper County, Virginia. The two leaders were Abraham Woodhull, and Robert Townsend, using the aliases of "Samuel Culper Sr.", and "Samuel Culper Jr.", respectively; Tallmadge was referred to as "John Bolton."
WThe Duquesne Spy Ring is the largest espionage case in the United States history that ended in convictions. A total of 33 members of a German espionage network headed by Frederick "Fritz" Joubert Duquesne were convicted after a lengthy investigation by the Federal Bureau of Investigation (FBI). Of those indicted, 19 pleaded guilty. The remaining 14 were brought to jury trial in Federal District Court, Brooklyn, New York, on September 3, 1941; all were found guilty on December 13, 1941. On January 2, 1942, the group members were sentenced to serve a total of over 300 years in prison.
WNILI was a Jewish espionage network which assisted the United Kingdom in its fight against the Ottoman Empire in Palestine between 1915 and 1917, during World War I. NILI is an acronym which stands for the Hebrew phrase "Netzah Yisrael Lo Yeshaker", which translates as "the Eternal One of Israel will not lie". The British government code-named NILI the "A Organization", according to a 1920 misfiled memorandum in the British National Archives, as described in the book Spies in Palestine by James Srodes.
WThe Red Orchestra, as it was known in Germany, was the name given by the Abwehr Section III.F to anti-Nazi resistance workers in August 1941. It primarily referred to a loose network of resistance groups, connected through personal contacts, uniting hundreds of opponents of the Nazi regime. These included groups of friends whose held discussions that were centred around Harro Schulze-Boysen and Arvid Harnack in Berlin, alongside many others. They printed and distributed illegal leaflets, posters, and stickers hoping to incite civil disobedience; helped Jews and opposition escape the regime; documented the crimes of the Nazi regime; and forwarded military intelligence to the Allies. Contrary to legend, the Red Orchestra was neither directed by Soviet communists nor under a single leadership but a network of groups and individuals, often operating independently. To date, about 400 members are known by name.
WThe Réseau AGIR was a World War II espionage group founded by French wartime resister Michel Hollard that provided decisive human intelligence on V-1 flying bomb facilities in the North of France. Thanks to Hollard's reports and information from his agents of the Réseau AGIR, the V1 launch sites located across North-Eastern Normandy to the Strait of Dover, were systematically bombed during Operation Crossbow.
WJohn Anthony Walker Jr. was a United States Navy chief warrant officer and communications specialist convicted of spying for the Soviet Union from 1968 to 1985 and sentenced to life in prison.