Controlled Substance Act (jan 11, 1970 – jul 14, 1986)
1970: The Controlled Substances Act is passed, prohibiting cannabis federally along with several other drugs and replacing the 1937 act. https://en.wikipedia.org/wiki/Timeline_of_cannabis_laws_in_the_United_States
Added to timeline:
History of drug use in America Timeline
A historical timeline of drug use in American culture and hi...