1969's 'volunteers', whose release coincided with jefferson airplane's performance at the Woodstock festival, is one of the group's most popular albums. it's also one of their most explicitly political efforts, calling for revolutionary action and countercultural unity on such memorable anthems as 'we can be together', 'wooden ships', 'eskimo blue day' and the album's iconic title song, with the band members' formidable musicianship augmented by guest players jerry garcia and nicky hopkins. volunteers' uncompromising stance originally made it a source of controversy; today, it's recognized as a rock landmark.