The contribution of the U.S. intelligence community (IC) to counterinsurgency operations past and present has gone largely underappreciated, in part because of the pervasive secrecy surrounding most of the IC's activities. A review of two recently declassified histories of Central Intelligence Agency (CIA) and National Security Agency (NSA) involvement in Vietnam in the 1960s provides insight into the historical contributions of these agencies to counterinsurgency efforts. This analysis provides a context for understanding available evidence relating to the two agencies' contributions to current counterinsurgency operations in Afghanistan and Iraq. The review concludes with intelligence policy recommendations.