Operation Ivy was an influential Ska punk band formed in Albany, California. The band consisted of frontman Jesse Michaels (vocals), Tim Armstrong (credited as "Lint") (vocals/guitar), Matt Freeman (credited as Matt McCall) (bass/backing vocals), and Dave Mello (Drums/backing vocals). The band's name, previously abandoned by another Gilman group, Isocracy, was derived from the Operation Ivy series of nuclear tests.