Those who do not understand history are doomed to repeat it. Let's take a look at drug trafficking during the Viet Nam War, shall we?!?
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. Because piles of money were being made from this practice and many others, those who stood to profit from this horrendous war – the armament manufacturers, bankers, military men, and drug dealers – met any suggestion to withdraw from Vietnam with immediate consternation. But that’s exactly what John F. Kennedy intended to do upon re-election. “Kennedy’s intended change in Vietnam policy – his plan to unilaterally withdraw from the imbroglio – infuriated not only the CIA but elements in the Pentagon and their allies in the military-industrial-complex. By this time, of course, the Lansky Syndicate had already set-up international heroin running from Southeast Asia through the CIA-linked Corsican Mafia in the Mediterranean. The joint Lansky-CIA operations in the international drug racket were a lucrative venture that thrived as a consequence of deep U.S. involvement in Southeast Asia as a cover for drug smuggling activities.”
This is why the drug lords, and those banks laundering the drug money for them, appear to be the only "winners" in this occupation of Afghanistan, other than the huge defense contractors providing mercenaries and material.