Project Agile

Project Agile was a series of military science studies in Asia sponsored by ARPA (the Advanced Research Projects Agency) during the Vietnam era. The project covered a broad range of counterinsurgency-related research, from sociological surveys of insurgent motivation to applied weapons technology. One component, contracted to the Battelle Memorial Institute in May 1966, investigated the development of olfactory weapons: chemical agents designed to induce fear or flight responses in specific target populations based on culturally conditioned or biologically mediated smell aversions.¹

Smell Weapons Research

The Battelle study, conducted under a contract with ARPA, drew on ethnographic and anthropological data to identify smells associated with fear, disgust, or danger in particular ethnic and cultural groups. Researchers Stuart Howard and William Hitt contributed to this work. The Karen people of Burma were identified as having a strong fear response to the smell of cooking fat. The Andanise people reportedly fled areas carrying the smell of cooked pork or turtle. Vegetarian populations were identified as having heightened aversion responses to the smell produced by meat-eating populations.¹

Three specific military applications were proposed: flushing guerrillas from jungle areas where conventional weapons could not reach them; keeping tribal guerrillas away from American forces by saturating areas with smells offensive to one group but not the other, exploiting the body odor differences between meat-eating and vegetarian populations; and conditioning target populations by repeatedly pairing conventional explosive strikes with an associated culturally offensive smell, so that the smell alone would come to trigger fear and behavioral disruption. The project represented an intersection of psychological operations research, chemical weapons development, and applied anthropology.¹

Broader ARPA Behavioral Research

ARPA sponsored 10 to 15 year research programs in areas including biofeedback and brain-weapon linkages. The organization was run by a lieutenant colonel who served as the primary scientific officer. ARPA's role in Project Agile made it a sponsor not only of hardware-oriented military research but of behavioral science with direct lethal or psychological applications.¹

The smell weapons program existed alongside the Rand Corporation's Viet Cong Motivation and Morale Study and other ARPA-funded social science work in Asia, all organized under the umbrella of understanding and exploiting psychological vulnerabilities in adversary and civilian populations.¹