The Jefferson Airplane's sixth album Volunteers was released in 1969, a mere two year since their monumental psychedelic hippie rock album Surrealistic Pillow. A politically charged album, Volunteers mainly dealt with the injustice of the Vietnam war.Besides its lyrical content causing controversy, the album was ahead of its time on a technological level as well. At the time, Volunteers was one of the first albums to be recorded on a state-of-the-art sixteen track tape recorder, a picture of which can be seen on the backside of the album sleeve.Musical collaborators include Stephen Stills and David Crosby. Volunteers is a crucial Jefferson record that ranks among the top albums of this seminal San Francisco psychedelic rock group.