The band released three studio albums, toured in the United States and Europe, and disbanded in 2009.

The classic lineup of Animosity consisted of vocalist Leo Miller, guitarists Frank Costa and Chase Fraser, bassist Evan Brewer and drummer Navene Koperweis.

[2] In 2005, they released their second disc, Empires, on Black Market Activities[3] (with distribution through Metal Blade Records) and toured the United States with Origin and Malevolent Creation.

The band's frontman Leo Miller stated that their "musical and experiential goals have been exceeded" and: "If you haven't gotten enough of Animosity, please rest assured that we have.

"[5] According to Blabbermouth.net, on their debut album, Shut It Down, Animosity "mixed a death metal based sound with thrash and hardcore, (...) incorporating the brutal aspects of [these] styles with accomplished musicianship and little concern for mass appeal", while their following album, Empires, went into an even more death metal-oriented direction.