spy

Espionage, spying, or intelligence gathering, as a subfield of the intelligence field, is the act of obtaining secret, confidential, or in some way valuable information. Such information is also referred to as intelligence. A professional trained in conducting intelligence operations by their government may be employed as an intelligence officer. Espionage may be conducted in a foreign country, domestically or remotely. The practice is clandestine, as it is by definition unwelcome. In some circumstances, it may be a legal tool of law enforcement and in others, it may be illegal and punishable by law.
Espionage is often part of an institutional effort by a government or commercial concern. The term is frequently associated with state spying on potential or actual enemies for military purposes. However, there are many types of espionage. Industrial espionage, for example, involves spying on civilians and their respective business or corporate interests.
One way spies gather data and information about a targeted military organization is by infiltrating its ranks. They can then return information such as the size and strength of the enemy forces. They can also find collaborators and dissidents within the organization and influence them to provide further information or defect. Spies can steal technology and sabotage the enemy in various ways. Counterespionage, also known as counterintelligence or offensive countertintelligence, is the practice of thwarting enemy espionage and intelligence gathering. Almost all sovereign states have laws concerning espionage and the penalties for being caught spying are often severe.

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