Metalcore is a broad fusion genre of extreme metal and hardcore punk. The name is an amalgam of the names of the two genres, distinguished by its emphasis on breakdowns, which are slow, intense passages that are conducive to moshing Pioneering bands — such as Hogan's Heroes, Earth Crisis, and Integrity, — are described to lean more toward hardcore, whereas later bands — such as Killswitch Engage, Underoath, All That Remains, Trivium, As I Lay Dying, Bullet for My Valentine, Parkway Drive, The Devil Wears Prada and Bury Tomorrow — are described to lean more towards metal. Sepultura, who have been said to have "helped to lay the groundwork" in the 2000s, and Pantera, who influenced Trivium, Atreyu, Bleeding Through and Unearth, have been particularly influential to the further development of metalcore in the 2000s.