The 1983 CIA Human Resource Exploitation (HRE) Training Manual is a declassified document detailing coercive interrogation techniques used to train intelligence units in Latin America during the Cold War. It synthesizes earlier KUBARK methodologies to instruct on both non-coercive and coercive methods, including sensory deprivation and psychological pressure, aimed at producing subject regression. The manual was officially utilized in countries like Honduras and El Salvador, leading to significant ethical controversies regarding its role in promoting torture. For more details, visit the Wikipedia page on U.S. Army and CIA interrogation manuals.