Military espionage, or military intelligence (MI), is a military discipline that focuses on information gathering, control, and dissemination about enemy units, terrain, and the weather in an area of operations.
Most armies maintain a military intelligence division, section, or corps. Officers and enlisted men assigned to military intelligence are selected for their analytical abilities and the ability to keep secrets. They receive formal training in these disciplines.
In Britain the MI abbreviation is used by MI5 and MI6, but neither organization is a military intelligence group - the use is a historical vestige relating to their origins. The intelligence group of the British Army is the Intelligence Corps.
