50th Anniversary of the War on Drugs

 - Click here for the Wikipedia entry on it.

And here's a list of federal level laws related to drug use.

so far incomplete

1914 - Harrison Narcotics Tax Act.
1922 - Narcotic Drugs Import and Export Act.
1930 - An Act created the Federal Bureau of Narcotics.
1934 - Uniform State Narcotic Drug Act.
1937 - Marihuana Tax Act.
1970 - Comprehensive Drug Abuse Prevention and Control Act.
1970 - Controlled Substances Act.
1978 - Psychotropic Substances Act.
1984 - Comprehensive Crime Control Act.
1986 - Anti-Drug Abuse Act.