Perhaps the biggest secret of the Vietnam War is that our Central Intelligence Agency seized control of the infamous Golden Triangle during that time period, then, along with assistance from various elements of Organized Crime, shipped huge amounts of heroin out of that area into our country. Real Life Air America: The CIA’s Covert Airline Used for Everything, including Drug Smuggling https://www.warhistoryonline.com/vietnam-war/real-life-air-america-the-cias-covert-airline-used-for-everything-including-drugsmuggling.html?chrome=1 The CIA, Contras, Gangs, and Crack Based on a year-long investigation, reporter Gary Webb wrote that during the 1980s the CIA helped finance its covert war against Nicaragua's leftist government through sales of cut-rate cocaine to South Central L.A. drug dealer, Ricky Ross. https://ips-dc.org/the_cia_contras_gangs_and_crack/