Espionage - History

History

Events involving espionage are well documented throughout history. The ancient writings of Chinese and Indian military strategists such as Sun-Tzu and Chanakya contain information on deception and subversion. Chanakya's student Chandragupta Maurya, founder of the Maurya Empire in India, made use of assassinations, spies and secret agents, which are described in Chanakya's Arthasastra. The ancient Egyptians had a thoroughly developed system for the acquisition of intelligence, and the Hebrews used spies as well, as in the story of Rahab. Spies were also prevalent in the Greek and Roman empires. During the 13th and 14th centuries, the Mongols relied heavily on espionage in their conquests in Asia and Europe. Feudal Japan often used ninja to gather intelligence. More recently, spies played a significant part in Elizabethan England (see Francis Walsingham). Many modern espionage methods were well established even then. Aztecs used Pochtecas, people in charge of commerce, as spies and diplomats, and had diplomatic immunity.

The Cold War involved intense espionage activity between the United States and its allies and the Soviet Union and China and their allies, particularly related to nuclear weapons secrets. Recently, espionage agencies have targeted the illegal drug trade and those considered to be terrorists. Since 2008 the United States has charged at least 57 defendants for attempting to spy for China.

Different intelligence services value certain intelligence collection techniques over others. The former Soviet Union, for example, preferred human sources over research in open sources, while the United States has tended to emphasize technological methods such as SIGINT and IMINT. Both Soviet political (KGB) and military intelligence (GRU) officers were judged by the number of agents they recruited.