Operation Ivy was a ska punk band who originated from the East Bay of San Francisco. Two of their members, Tim Armstrong ("Lint") and Matt Freeman (credited as Matt McCall), went on to form the band Rancid. There was a great deal of speculation regarding the fate of frontman Jesse Michaels, with many fans believing that he had moved to South America or become a BuddhistMonk. Michaels eventually resurfaced into the music world with his project, Common Rider.