Anti-Flag are an American punk band from Pittsburgh, Pennsylvania , United States. The band is well known for political activism, focusing on anti-war activism, anti-imperialism , class struggle , human rights , and various sociopolitical sentiments. The line-up includes singer/guitarist Justin Sane and drummer Pat Thetic, who founded the band; later members are guitarist Chris Head, and singer/bassist Chris Barker (#2) who replaced Jamie "Cock" Towns, who had replaced original bassist Andy Flag in 1997 following his departure one year prior. Anti-Flag is known also for their advocacy of progressive political action groups such as Greenpeace and Amnesty International. Most recently, the band has declared solidarity with the global Occupy Together movement.
Anti-Flag was formed in 1988 by singer/guitarist Justin Sane and drummer Pat Thetic. During the band's early years, various guitarists and bassists moved in and out of the band, including Justin's sister, Lucy Fester formerly of Chicago band Toothpaste. The band failed to solidify, and it fell apart after playing just one show.  In 1992, Justin and Pat reformed the band, now with Andy Flag on bass. A 17-song demo album called 17 Songs was released the same year.