The war on drugs is a global campaign , led by the U.S.federal government , of drug prohition , military aid   and intervention, whose aim is to reduce the illegal drug trade  in the US, popularized after the press conference given on 1971 by President Richard Nixon d uring which he declared drug abuse "public enemy number one". Two years before, Nixon had formally declared a "war on drugs" directed toward eradication, interdiction, and incarceration. The Drug Policy Alliance , which advocates for an end to the War on Drugs, have estimated that in 2021 the US has spent a cumulative $1 trillion on it. Sixty years after the initiation of the UN Single Convention on Narcotic Drugs  and years after Nixon initiative, fundamental reforms in national and global drug control policies are urgently needed. This war is also fought abroad against the main exporters such as Colombia, Mexico and Latin America. As part of its Plan Colombia program , among other ones, the US