

Historically, the United States Army Counterintelligence mission was performed by the Corps of Intelligence Police during World War I, the Counter Intelligence Corps (CIC) during World War II & Cold War, and later by the now defunct U.S. Army Counterintelligence Special Agents today operate under the auspices of the United States Army Intelligence and Security Command, with the 902nd Military Intelligence Group responsible for counterintelligence activities and operating field offices within the continental United States. The Army continues to keep these two investigative channels separate via Army CI and Army CID, even though parallel investigations do happen periodically. military, the counterintelligence mission is performed by the Office of Special Investigations for the Air Force, and the Naval Criminal Investigative Service for the Navy and Marine Corps, which also conduct general criminal investigations for their respective services. Within the Army, these agents have apprehension powers and jurisdiction in the investigation of national security crimes such as treason, spying, espionage, sedition, subversion, sabotage with intent to damage national defense, and support to international terrorism, while other criminal matters are investigated by United States Army Criminal Investigation Command.

Military and civilian personnel trained and appointed to conduct counterintelligence investigations and operations are credentialed and titled as Counterintelligence Special Agents (occasionally referred to simply as "CI" or "Army Intelligence Agents"), and carry badge and credentials identifying their status as federal agents (federal law enforcement officers). United States Army Counterintelligence is the component of United States Army Intelligence which conducts counterintelligence activities to detect, identify, assess, counter, exploit and/or neutralize adversarial, foreign intelligence services, international terrorist organizations, and insider threats to the United States Army and U.S. Intelligence and Security Command, Fort Belvoir, VA
