I roto i te 1986, hoa Billie Joe Armstrong ko Mike Dirnt, 14 tau te pakeke i taua wa, i hanga i te rōpū i huaina Sweet Children. i tū te whakaaturanga ora tuatahi o te rōpū i runga i Oketopa 17, 1987, i roto i Rod o Hickory Pit i Vallejo, California. i roto i te 1988, Armstrong ko Dirnt tīmata te mahi ki mua Isocracy drummer John Kiffmeyer, mohiotia hoki rite "Al Sobrante". Armstrong whakahuatia te rōpū Operation Ivy (i roto i nei Tim Armstrong ko Matt Freeman o Rancid) rite te mana nui, me te rōpū e faauruhia ia ki te hanga i te rōpū. i roto i te 1988, Larry Livermore, rangatira o Lookout! Records, kite i te rōpū tākaro i te whakaatu wawe, ka hainatia te rōpū ki tona tapanga. i roto i te 1989, ka tuhia te rōpū i tona tākaro roa, 1,000 Hours. i te aroaro o 1,000 Hours, i tukua te rōpū i te ingoa Liver Children; i raro i tenei mahi i raro i te Oketopa 17, 1990, i te nuinga i mahi i raro i te ingoa motuhake John Kiffmeyer, mohiotia hoki rite "
Ko Slappy, me ngā haora 1,000