Originally released in September 1991, Use Your Illusion II is the fourth studio album by the American band, released on the same day as its counterpart, Use Your Illusion I. Although the band did not abandon the aggressive hard-rock sound they had become known for with Appetite For Destruction (1987), Use Your Illusion II demonstrated a new-found musical maturity, incorporating elements of blues, classical music, heavy metal, punk rock, and classic rock and roll. In addition, Use Your Illusion II is more political than most of their previous work. Features the singles “You Could Be Mine,” “Knockin’ on Heaven’s Door,” “Yesterdays,” “Civil War” and “Estranged.”