John Sinclair Freedom Rally

The John Sinclair Freedom Rally was a protest and concert in response to the imprisonment of John Sinclair for possession of marijuana held on December 10, 1971, in the Crisler Arena at the University of Michigan in Ann Arbor, Michigan. The event was filmed and released as "Ten For Two".
The reason behind the concert was the sentencing of Sinclair, who was given ten years in prison for the possession of two marijuana cigarettes. Shortly after the event, Sinclair was released.