c.544-496 B.C.
Sun Tzu writes the Art of War about the importance of a secret intelligence system
218 A.D.
Hannibal places spies in Rome before he leads soldiers and elephants across the Alps into Italy
1587
Mary Queen of Scots is killed when Elizabeth I’s spymaster Sir Francis Walsingham discovers a conspiracy
1633
In France, Cardinal Richelieu creates the Cabinet Noir, a private agency that gathers secret intelligence for King Louis XIII
1653
Royalists in England form the Sealed Knot to get Charles II back on the throne
1778
Benjamin Tallmadge organizes the Culper Ring to spy on the British during the American Revolutionary War
1861
Allan Pinkerton is hired as the head of the Union Intelligence Service during the American Civil War
1909
The UK creates the British Secret Intelligence Service, MI6
1914
WWI begins
1926
The German Army begins using the Enigma, a machine that creates coded messages
1938
The English mansion, Bletchley Park, becomes a center of secret training and code-breaking
1939
WWII begins
1947
The CIA is founded
1950
The atomic spies are uncovered. They gave secret information about the U.S., U.K., and Canadian nuclear bomb projects to the Soviet Union
1953
Ian Fleming writes the first James Bond book
1954
WWI beginsThe Soviet Union forms its own secret agency, the KGB
1960
The U.S. spy satellite, Discoverer 14, takes images of the Soviet Union from Space
1991
The Cold War between the Soviet Union and U.S. ends
2005
The U.S. creates a new intelligence strategy after the terrorist attacks on September 11th