The United States has long been concerned with Colombia as a major producer and trafficker of the illegal narcotics entering this country: first marijuana, then cocaine, and now also heroin. Colombia's drug trafficking business has been dominated by two cartels during the two decades in which cocaine trafficking became a major activity: first the Medellin cartel, which dominated during the 1980s and then the Cali cartel, which dominated during the early 1990s. With the arrests of the major Cali cartel leaders in the mid-1990s, independent traffickers have filled the void.
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The United States has long been concerned with Colombia as a major producer and trafficker of the illegal narcotics entering this country: first marijuana, then cocaine, and now also heroin. Colombia's drug trafficking business has been dominated by two cartels during the two decades in which cocaine trafficking became a major activity: first the Medellin cartel, which dominated during the 1980s and then the Cali cartel, which dominated during the early 1990s. With the arrests of the major Cali cartel leaders in the mid-1990s, independent traffickers have filled the void.
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Serafino, Nina M.Colombia: The Problem of Illegal Narcotics and U.S. - Colombian Relations,
report,
May 11, 1998;
Washington D.C..
(https://digital.library.unt.edu/ark:/67531/metacrs620/:
accessed May 21, 2026),
University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu;
crediting UNT Libraries Government Documents Department.